Fix long branch name overflows (https://github.com/go-gitea/gitea/pull/30345)

Fixes: https://github.com/go-gitea/gitea/issues/27971
Fixes: https://github.com/go-gitea/gitea/pull/28010

<img width="689" alt="Screenshot 2024-04-09 at 00 19 57"
src="7c895a47-274f-40a6-a126-290658f1982d">

Also fixes a similar issue in issue list where CSS was there but not
active because of missing `display: block`.

<img width="372" alt="Screenshot 2024-04-09 at 00 18 25"
src="cfbee7cd-2e15-4ac7-96ce-020816f48798">

---
Little conflict in branch_selector_field (repo.pulls.no_results is renamed in Gitea)
And some weird conflict on new CSS rules added.

web_src/js/components/RepoBranchTagSelector.vue

@@ -248,12 +248,12 @@ export default sfc; // activate IDE's Vue plugin
 <template>
   <div class="ui dropdown custom">
     <button class="branch-dropdown-button gt-ellipsis ui basic small compact button tw-flex tw-m-0" @click="menuVisible = !menuVisible" @keyup.enter="menuVisible = !menuVisible">
-      <span class="text tw-flex tw-items-center tw-mr-1">
+      <span class="text tw-flex tw-items-center tw-mr-1 gt-ellipsis">
         <template v-if="release">{{ textReleaseCompare }}</template>
         <template v-else>
           <svg-icon v-if="isViewTag" name="octicon-tag"/>
           <svg-icon v-else name="octicon-git-branch"/>
-          <strong ref="dropdownRefName" class="tw-ml-2">{{ refNameText }}</strong>
+          <strong ref="dropdownRefName" class="tw-ml-2 tw-inline-block gt-ellipsis">{{ refNameText }}</strong>
         </template>
       </span>
       <svg-icon name="octicon-triangle-down" :size="14" class-name="dropdown icon"/>