Use data-tooltip-content for tippy tooltip (#23649)

Follow:
* #23574
* Remove all ".tooltip[data-content=...]"

Major changes:

* Remove "tooltip" class, use "[data-tooltip-content=...]" instead of
".tooltip[data-content=...]"
* Remove legacy `data-position`, it's dead code since last Fomantic
Tooltip -> Tippy Tooltip refactoring
* Rename reaction attribute from `data-content` to
`data-reaction-content`
* Add comments for some `data-content`: `{{/* used by the form */}}`
* Remove empty "ui" class
* Use "text color" for SVG icons (a few)

web_src/js/components/DashboardRepoList.vue

@@ -10,7 +10,7 @@
           {{ textMyRepos }}
           <span class="ui grey label gt-ml-3">{{ reposTotalCount }}</span>
         </div>
-        <a class="tooltip" :href="subUrl + '/repo/create'" :data-content="textNewRepo" data-position="left center">
+        <a :href="subUrl + '/repo/create'" :data-tooltip-content="textNewRepo">
           <svg-icon name="octicon-plus"/>
           <span class="sr-only">{{ textNewRepo }}</span>
         </a>
@@ -119,7 +119,7 @@
           {{ textMyOrgs }}
           <span class="ui grey label gt-ml-3">{{ organizationsTotalCount }}</span>
         </div>
-        <a v-if="canCreateOrganization" class="tooltip" :href="subUrl + '/org/create'" :data-content="textNewOrg" data-position="left center">
+        <a v-if="canCreateOrganization" :href="subUrl + '/org/create'" :data-tooltip-content="textNewOrg">
           <svg-icon name="octicon-plus"/>
           <span class="sr-only">{{ textNewOrg }}</span>
         </a>

web_src/js/components/DiffFileList.vue

@@ -4,12 +4,12 @@
       <div class="gt-bold gt-df gt-ac pull-right">
         <span v-if="file.IsBin" class="gt-ml-1 gt-mr-3">{{ binaryFileMessage }}</span>
         {{ file.IsBin ? '' : file.Addition + file.Deletion }}
-        <span v-if="!file.IsBin" class="diff-stats-bar tooltip gt-mx-3" :data-content="statisticsMessage.replace('%d', (file.Addition + file.Deletion)).replace('%d', file.Addition).replace('%d', file.Deletion)">
+        <span v-if="!file.IsBin" class="diff-stats-bar gt-mx-3" :data-tooltip-content="statisticsMessage.replace('%d', (file.Addition + file.Deletion)).replace('%d', file.Addition).replace('%d', file.Deletion)">
           <div class="diff-stats-add-bar" :style="{ 'width': diffStatsWidth(file.Addition, file.Deletion) }" />
         </span>
       </div>
       <!-- todo finish all file status, now modify, add, delete and rename -->
-      <span :class="['status', diffTypeToString(file.Type), 'tooltip']" :data-content="diffTypeToString(file.Type)" data-position="right center">&nbsp;</span>
+      <span :class="['status', diffTypeToString(file.Type)]" :data-tooltip-content="diffTypeToString(file.Type)">&nbsp;</span>
       <a class="file gt-mono" :href="'#diff-' + file.NameHash">{{ file.Name }}</a>
     </li>
     <li v-if="isIncomplete" id="diff-too-many-files-stats" class="gt-pt-2">

web_src/js/components/DiffFileTreeItem.vue

@@ -5,7 +5,6 @@
       <!-- Files -->
       <SvgIcon
         v-if="item.isFile"
-        data-position="right center"
         name="octicon-file"
         class="svg-icon file"
       />
@@ -16,7 +15,6 @@
       >{{ item.name }}</a>
       <SvgIcon
         v-if="item.isFile"
-        data-position="right center"
         :name="getIconForDiffType(item.file.Type)"
         :class="['svg-icon', getIconForDiffType(item.file.Type), 'status']"
       />