Fix position of label color picker colors (go-gitea#17866)

Author: silverwind

web_src/less/_base.less

@@ -2123,10 +2123,10 @@ table th[data-sortt-desc] {
 }
 
 .precolors {
-  padding-left: 0;
-  padding-right: 0;
-  margin: 3px 10px auto;
-  width: 120px;
+  padding-left: 0 !important;
+  padding-right: 0 !important;
+  margin: 3px 10px auto !important;
+  width: 120px !important;
 
   .color {
     float: left;