Merge branch '5.4'

diff --cc .github/workflows/typescript.yml
index c8fa50407a2ec38ffeca6b559edc217994e690ec,6b48241cc16fbd26d0349c88e989ac988f0c2d19..50d5879d413357e6527207c727b2c1ac728a7217
--- 1/.github/workflows/typescript.yml
--- 2/.github/workflows/typescript.yml
+++ b/.github/workflows/typescript.yml
@@@ -50,8 -47,9 +50,9 @@@ jobs
        uses: actions/setup-node@v2
        with:
          node-version: "16"
 -    - uses: actions/checkout@v3
 +        cache: "npm"
      - run: npm install
+     - run: rm -r wcfsetup/install/files/js/WoltLabSuite/
      - run: npx tsc
      - run: echo "::add-matcher::.github/diff.json"
      - name: Show diff

diff --cc com.woltlab.wcf/package.xml
index ea78fba0a782a2a249477bacf147baa6324ac388,3623f044c687e0646fbd6606d00580e7a8e8f2f1..f878fd8f928e2c3098adfab03cd03458ff8a096c
--- 1/com.woltlab.wcf/package.xml
--- 2/com.woltlab.wcf/package.xml
+++ b/com.woltlab.wcf/package.xml
@@@ -5,8 -5,8 +5,8 @@@
                <packagedescription>Free CMS and web-framework, designed for awesome websites and communities.</packagedescription>
                <packagedescription language="de">Freies CMS und Web-Framework, das eindrucksvolle Websites und Communities ermöglicht.</packagedescription>
                <isapplication>1</isapplication>
 -              <version>5.4.15 dev 2</version>
 +              <version>5.5.0 Alpha 1</version>
-               <date>2022-02-15</date>
+               <date>2022-03-15</date>
        </packageinformation>
        
        <authorinformation>
@@@ -50,63 -50,21 +50,71 @@@
                <instruction type="script">acp/post_install.php</instruction>
        </instructions>
  
 -      <instructions type="update" fromversion="5.4.14">
 -              <instruction type="acpTemplate">acptemplates_update.tar</instruction>
 -              <instruction type="file">files_update.tar</instruction>
 -              <instruction type="template">templates_update.tar</instruction>
 -              
 -              <instruction type="language"/>
 -              
 -              <instruction type="script">acp/update_com.woltlab.wcf_5.4.15_deleteDsStore.php</instruction>
 +      <instructions type="update" fromversion="5.4.*">
 +              <!--
 +tar cvf com.woltlab.wcf/files_pre_check.tar -C wcfsetup/install/files/ \
 +      acp/update_com.woltlab.wcf_5.5_ensureInnoDbSearch.php \
 +      acp/update_com.woltlab.wcf_5.5_normalizeFileLog.php \
 +      acp/update_com.woltlab.wcf_5.5_styleVariables.php
 +              -->
 +              <instruction type="file" run="standalone">files_pre_check.tar</instruction>
 +
 +              <!-- Checks that need to happen before the upgrade starts. -->
 +              <instruction type="script" run="standalone">acp/update_com.woltlab.wcf_5.5_ensureInnoDbSearch.php</instruction>
 +
 +              <!-- Clean up the file log. -->
 +              <instruction type="script" run="standalone">acp/update_com.woltlab.wcf_5.5_normalizeFileLog.php</instruction>
 +
 +              <!-- Insert the new style variables early to prevent style rebuilds bricking the system. -->
 +              <instruction type="script" run="standalone">acp/update_com.woltlab.wcf_5.5_styleVariables.php</instruction>
 +
 +              <!-- Deploy new application code. -->
 +              <instruction type="file" />
 +              <instruction type="acpTemplate" />
 +              <instruction type="template" />
 +
 +              <!-- Make all the new options available as early as possible. -->
 +              <instruction type="option" run="standalone" />
 +
 +              <!-- The updated object types are required for the boxCondition migrator. -->
 +              <instruction type="objectTypeDefinition" />
 +              <instruction type="objectType" />
 +
 +              <!-- Migrate the database as early as possible. -->
 +              <instruction type="database" run="standalone">acp/database/update_com.woltlab.wcf_5.5.php</instruction>
 +              <instruction type="script" run="standalone">acp/update_com.woltlab.wcf_5.5_boxConditions.php</instruction>
 +
 +              <!-- Install new PIPs (fileDelete, templateDelete, acpTemplateDelete). -->
 +              <instruction type="packageInstallationPlugin" />
 +
 +              <!-- Misc. PIPs. -->
 +              <instruction type="eventListener" />
 +              <instruction type="language" />
 +              <instruction type="mediaProvider" />
 +              <instruction type="userGroupOption" />
 +
 +              <!-- Updates to <allowSpidersToIndex> only -->
 +              <instruction type="page" />
 +
 +              <!-- Clean Up. -->
 +              <instruction type="acpTemplateDelete" />
 +              <instruction type="fileDelete" />
 +              <instruction type="templateDelete" />
 +              <instruction type="script" run="standalone">acp/update_com.woltlab.wcf_5.5_clearPackageDeprecations.php</instruction>
 +
 +              <!-- Misc. Update Scripts. -->
 +              <instruction type="script" run="standalone">acp/update_com.woltlab.wcf_5.5_randomize_cronjobs.php</instruction>
 +
 +              <!-- Migrate the STARTTLS option last. This requires external connections and thus is the
 +                      step that most likely might fail. -->
 +              <instruction type="script" run="standalone">acp/update_com.woltlab.wcf_5.5_starttls.php</instruction>
        </instructions>
+ 
+       <instructions type="update" fromversion="5.4.15 dev 1">
+               <instruction type="file">files_update.tar</instruction>
+               
+               <instruction type="language"/>
+ 
+               <instruction type="script">acp/update_com.woltlab.wcf_5.4.15_deleteDsStore.php</instruction>
+       </instructions>
  </package>

diff --cc wcfsetup/install/files/lib/system/message/unfurl/UnfurlResponse.class.php
Simple merge