Fix branch dropdown shifting on page load (#21428)

Removed the "tag/branch" prefix and did some misc tweaks like changing to `<button>` for a11y and adding a bit of margin besides repo path.

templates/repo/branch_dropdown.tmpl

@@ -2,7 +2,7 @@
 {{$defaultBranch := $.root.BranchName}}{{if and .root.IsViewTag (not .noTag)}}{{$defaultBranch = .root.TagName}}{{end}}{{if eq $defaultBranch ""}}{{$defaultBranch = $.root.Repository.DefaultBranch}}{{end}}
 {{$type := ""}}{{if and .root.IsViewTag (not .noTag)}}{{$type = "tag"}}{{else if .root.IsViewBranch}}{{$type = "branch"}}{{else}}{{$type = "tree"}}{{end}}
 {{$showBranchesInDropdown := not .root.HideBranchesInDropdown}}
-<div class="fitted item choose reference{{if not $release}} mr-1{{end}}">
+<div class="fitted item choose reference">
 	<div class="ui floating filter dropdown custom"
 		data-branch-form="{{if $.branchForm}}{{$.branchForm}}{{end}}"
 		data-can-create-branch="{{if .canCreateBranch}}{{.canCreateBranch}}{{else}}{{.root.CanCreateBranch}}{{end}}"
@@ -14,19 +14,19 @@
 		data-branch-url-suffix="{{if .branchURLSuffix}}{{.branchURLSuffix}}{{else}}{{if $.root.TreePath}}/{{PathEscapeSegments $.root.TreePath}}{{end}}{{end}}"
 		data-tag-url-prefix="{{if .tagURLPrefix}}{{.tagURLPrefix}}{{else if $release}}{{$.root.RepoLink}}/compare/{{else}}{{$.root.RepoLink}}/{{if $.root.PageIsCommits}}commits{{else}}src{{end}}/tag/{{end}}"
 		data-tag-url-suffix="{{if .tagURLSuffix}}{{.tagURLSuffix}}{{else if $release}}...{{if $release.IsDraft}}{{PathEscapeSegments $release.Target}}{{else}}{{if $release.TagName}}{{PathEscapeSegments $release.TagName}}{{else}}{{PathEscapeSegments $release.Sha1}}{{end}}{{end}}{{else}}{{if $.root.TreePath}}/{{PathEscapeSegments $.root.TreePath}}{{end}}{{end}}">
-		<div class="branch-dropdown-button ellipsis ui basic small compact button" @click="menuVisible = !menuVisible" @keyup.enter="menuVisible = !menuVisible">
+		<button class="branch-dropdown-button ellipsis ui basic small compact button df" @click="menuVisible = !menuVisible" @keyup.enter="menuVisible = !menuVisible">
-			<span class="text">
+			<span class="text df ac mr-2">
 				{{if $release}}
 					{{.root.locale.Tr "repo.release.compare"}}
 				{{else}}
-					<span :class="{visible: isViewTag}" v-if="isViewTag" {{if not (eq $type "tag")}}v-cloak{{end}}>{{svg "octicon-tag"}} {{.root.locale.Tr "repo.tag"}}:</span>
+					<span :class="{visible: isViewTag}" v-if="isViewTag" {{if not (eq $type "tag")}}v-cloak{{end}}>{{svg "octicon-tag"}}</span>
-					<span :class="{visible: isViewBranch}" v-if="isViewBranch" {{if not (eq $type "branch")}}v-cloak{{end}}>{{svg "octicon-git-branch"}} {{.root.locale.Tr "repo.branch"}}:</span>
+					<span :class="{visible: isViewBranch}" v-if="isViewBranch" {{if not (eq $type "branch")}}v-cloak{{end}}>{{svg "octicon-git-branch"}}</span>
-					<span :class="{visible: isViewTree}" v-if="isViewTree" {{if not (eq $type "tree")}}v-cloak{{end}}>{{svg "octicon-git-branch"}} {{.root.locale.Tr "repo.tree"}}:</span>
+					<span :class="{visible: isViewTree}" v-if="isViewTree" {{if not (eq $type "tree")}}v-cloak{{end}}>{{svg "octicon-git-branch"}}</span>
-					<strong ref="dropdownRefName">{{if and .root.IsViewTag (not .noTag)}}{{.root.TagName}}{{else if .root.IsViewBranch}}{{.root.BranchName}}{{else}}{{ShortSha .root.CommitID}}{{end}}</strong>
+					<strong ref="dropdownRefName" class="ml-3">{{if and .root.IsViewTag (not .noTag)}}{{.root.TagName}}{{else if .root.IsViewBranch}}{{.root.BranchName}}{{else}}{{ShortSha .root.CommitID}}{{end}}</strong>
 				{{end}}
 			</span>
 			{{svg "octicon-triangle-down" 14 "dropdown icon"}}
-		</div>
+		</button>
 		<div class="data" style="display: none" data-mode="{{if or .root.IsViewTag .isTag}}tags{{else}}branches{{end}}">
 			{{if $showBranchesInDropdown}}
 				{{range .root.Branches}}

templates/repo/home.tmpl

@@ -102,7 +102,7 @@
 					</button>
 				{{end}}
 				{{if ne $n 0}}
-					<span class="ui breadcrumb repo-path"><a class="section" href="{{.RepoLink}}/src/{{.BranchNameSubURL}}" title="{{.Repository.Name}}">{{EllipsisString .Repository.Name 30}}</a>{{range $i, $v := .TreeNames}}<span class="divider">/</span>{{if eq $i $l}}<span class="active section" title="{{$v}}">{{EllipsisString $v 30}}</span>{{else}}{{$p := index $.Paths $i}}<span class="section"><a href="{{$.BranchLink}}/{{PathEscapeSegments $p}}" title="{{$v}}">{{EllipsisString $v 30}}</a></span>{{end}}{{end}}</span>
+					<span class="ui breadcrumb repo-path ml-2"><a class="section" href="{{.RepoLink}}/src/{{.BranchNameSubURL}}" title="{{.Repository.Name}}">{{EllipsisString .Repository.Name 30}}</a>{{range $i, $v := .TreeNames}}<span class="divider">/</span>{{if eq $i $l}}<span class="active section" title="{{$v}}">{{EllipsisString $v 30}}</span>{{else}}{{$p := index $.Paths $i}}<span class="section"><a href="{{$.BranchLink}}/{{PathEscapeSegments $p}}" title="{{$v}}">{{EllipsisString $v 30}}</a></span>{{end}}{{end}}</span>
 				{{end}}
 			</div>
 			<div class="df ac">