add marking to title_wip_desc (#8705)

Signed-off-by: May <themaymeow@gmail.com>

public/css/index.css

@@ -898,6 +898,7 @@ tbody.commit-list{vertical-align:baseline}
 .file-header{display:flex;justify-content:space-between;align-items:center;padding:8px 12px!important}
 .file-info{display:flex;align-items:center}
 .file-info-entry+.file-info-entry{border-left:1px solid currentColor;margin-left:8px;padding-left:8px}
+.title_wip_desc{margin-top:1em}
 .CodeMirror{font:14px 'SF Mono',Consolas,Menlo,'Liberation Mono',Monaco,'Lucida Console',monospace}
 .CodeMirror.cm-s-default{border-radius:3px;padding:0!important}
 .CodeMirror .cm-comment{background:inherit!important}

public/less/_repository.less

@@ -2456,3 +2456,7 @@ tbody.commit-list {
     margin-left: 8px;
     padding-left: 8px;
 }
+
+.title_wip_desc {
+    margin-top: 1em;
+}

templates/repo/issue/new_form.tmpl

@@ -15,7 +15,7 @@
 					<div class="field">
 						<input name="title" id="issue_title" placeholder="{{.i18n.Tr "repo.milestones.title"}}" value="{{.title}}" tabindex="3" autofocus required>
 						{{if .PageIsComparePull}}
-							<span class="title_wip_desc">{{.i18n.Tr "repo.pulls.title_wip_desc" (index .PullRequestWorkInProgressPrefixes 0| Escape) | Safe}}</span>
+							<div class="title_wip_desc">{{.i18n.Tr "repo.pulls.title_wip_desc" (index .PullRequestWorkInProgressPrefixes 0| Escape) | Safe}}</div>
 						{{end}}
 					</div>
 					{{template "repo/issue/comment_tab" .}}