"Copy branch name" button in pull request

Signed-off-by: Mario Lubenka <mario.lubenka@googlemail.com>

Author: saitho

Diff for: options/locale/locale_en-US.ini

@@ -927,6 +927,9 @@ star_guest_user = Sign in to star this repository.
 copy_link = Copy
 copy_link_success = Link has been copied
 copy_link_error = Use ⌘C or Ctrl-C to copy
+copy_branch = Copy
+copy_branch_success = Branch name has been copied
+copy_branch_error = Use ⌘C or Ctrl-C to copy
 copied = Copied OK
 unwatch = Unwatch
 watch = Watch

Diff for: templates/repo/issue/view_title.tmpl

@@ -34,6 +34,7 @@
 		{{if .HeadBranchHTMLURL}}
 			{{$headHref = printf "<a href=\"%s\">%s</a>" .HeadBranchHTMLURL $headHref}}
 		{{end}}
+		{{$headHref = printf "%s <a class=\"poping up\" data-content=\"%s\" data-success=\"%s\" data-error=\"%s\" data-clipboard-text=\"%s\">%s</a>" $headHref (.i18n.Tr "repo.copy_branch") (.i18n.Tr "repo.copy_branch_success") (.i18n.Tr "repo.copy_branch_error") (.HeadTarget | Escape) (svg "octicon-copy" 14)}}
 		{{$baseHref := .BaseTarget|Escape}}
 		{{if .BaseBranchHTMLURL}}
 			{{$baseHref = printf "<a href=\"%s\">%s</a>" .BaseBranchHTMLURL $baseHref}}
@@ -42,18 +43,18 @@
 			{{ $mergedStr:= TimeSinceUnix .Issue.PullRequest.MergedUnix $.Lang }}
 			{{if .Issue.OriginalAuthor }}
 				{{.Issue.OriginalAuthor}}
-				<span class="pull-desc">{{$.i18n.Tr "repo.pulls.merged_title_desc" .NumCommits $headHref $baseHref $mergedStr | Str2html}}</span>
+				<span class="pull-desc">{{$.i18n.Tr "repo.pulls.merged_title_desc" .NumCommits $headHref $baseHref $mergedStr | Safe}}</span>
 			{{else}}
 				<a {{if gt .Issue.PullRequest.Merger.ID 0}}href="{{.Issue.PullRequest.Merger.HomeLink}}"{{end}}>{{.Issue.PullRequest.Merger.GetDisplayName}}</a>
-				<span class="pull-desc">{{$.i18n.Tr "repo.pulls.merged_title_desc" .NumCommits $headHref $baseHref $mergedStr | Str2html}}</span>
+				<span class="pull-desc">{{$.i18n.Tr "repo.pulls.merged_title_desc" .NumCommits $headHref $baseHref $mergedStr | Safe}}</span>
 			{{end}}
 		{{else}}
 			{{if .Issue.OriginalAuthor }}
-				<span id="pull-desc" class="pull-desc">{{.Issue.OriginalAuthor}} {{$.i18n.Tr "repo.pulls.title_desc" .NumCommits $headHref $baseHref | Str2html}}</span>
+				<span id="pull-desc" class="pull-desc">{{.Issue.OriginalAuthor}} {{$.i18n.Tr "repo.pulls.title_desc" .NumCommits $headHref $baseHref | Safe}}</span>
 			{{else}}
 				<span id="pull-desc" class="pull-desc">
 					<a {{if gt .Issue.Poster.ID 0}}href="{{.Issue.Poster.HomeLink}}"{{end}}>{{.Issue.Poster.GetDisplayName}}</a>
-					{{$.i18n.Tr "repo.pulls.title_desc" .NumCommits $headHref $baseHref | Str2html}}
+					{{$.i18n.Tr "repo.pulls.title_desc" .NumCommits $headHref $baseHref | Safe}}
 				</span>
 			{{end}}
 			<span id="pull-desc-edit" style="display: none">

Diff for: web_src/less/_repository.less

@@ -686,6 +686,15 @@
       code {
         color: var(--color-primary);
       }
+      a[data-clipboard-text] {
+        cursor: pointer;
+        svg {
+          vertical-align: middle;
+          position: relative;
+          top: -2px;
+          right: 1px;
+        }
+      }
     }
 
     .pull {