Fix missing styling for dropdown icon on review button (#11998)

* Fix missing styling for dropdown icon on review button

* Remove unnecessary span element

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

templates/repo/diff/new_review.tmpl

@@ -1,6 +1,6 @@
 <div class="ui top right pointing dropdown custom" id="review-box">
 	<div class="ui tiny green button btn-review">
-		<span class="text">{{.i18n.Tr "repo.diff.review"}}</span>
+		{{.i18n.Tr "repo.diff.review"}}
 		<i class="dropdown icon"></i>
 	</div>
 	<div class="menu review-box">

web_src/less/_review.less

@@ -156,6 +156,12 @@
     color: #428bca;
 }
 
+.btn-review > .dropdown.icon {
+    width: auto;
+    font-size: .85714286em;
+    margin: 0 0 0 1em;
+}
+
 @media only screen and (max-width: 768px) {
     #review-box > .menu {
         > .ui.segment {