styling: fixing gravatar size for reviewers

rhodecode/public/css/main.less

@@ -1194,6 +1194,8 b' table.integrations {'
 	}
 
 	img {
+        height: @gravatar-size;
+        width: @gravatar-size;
 		margin-right: 1em;
 	}
 
@@ -1356,6 +1358,13 b' table.integrations {'
     margin-top: 0;
     padding: 0;
     list-style: outside none none;
+
+    img {
+        height: @gravatar-size;
+        width: @gravatar-size;
+        margin-right: .5em;
+        margin-left: 3px;
+    }
 }
 .reviewer_ac .ac-input {
     width: 92%;