Add ui style for "Open a blank issue" button (#12824)

* Add ui style for "Open a blank issue" button

Signed-off-by: a1012112796 <1012112796@qq.com>

* Apply review suggestion @silverwind

* format

* format 2

* fix message

Co-authored-by: Lauris BH <lauris@nix.lv>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

Author: 3 people

options/locale/locale_en-US.ini

@@ -940,7 +940,8 @@ issues.new.no_assignees = No Assignees
 issues.new.no_reviewers = No reviewers
 issues.new.add_reviewer_title = Request review
 issues.choose.get_started = Get Started
-issues.choose.blank = Open a blank issue
+issues.choose.blank = Default
+issues.choose.blank_about = Create an issue from default template. 
 issues.no_ref = No Branch/Tag Specified
 issues.create = Create Issue
 issues.new_label = New Label

templates/repo/issue/choose.tmpl

@@ -19,7 +19,17 @@
 				</div>
 			</div>
 		{{end}}
-		<a href="{{.RepoLink}}/issues/new{{if .milestone}}?milestone={{.milestone}}{{end}}">{{.i18n.Tr "repo.issues.choose.blank"}}</a>
+		<div class="ui attached segment">
+			<div class="ui two column grid">
+				<div class="column left aligned">
+					<strong>{{.i18n.Tr "repo.issues.choose.blank"}}</strong>
+					<br/>{{.i18n.Tr "repo.issues.choose.blank_about"}}
+				</div>
+				<div class="column right aligned">
+					<a href="{{.RepoLink}}/issues/new{{if .milestone}}?milestone={{.milestone}}{{end}}" class="ui green button">{{$.i18n.Tr "repo.issues.choose.get_started"}}</a>
+				</div>
+			</div>
+		</div>
 	</div>
 </div>
 {{template "base/footer" .}}