Improve issue/mr title and description styles

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/assets/stylesheets/pages/issuable.scss

@@ -66,4 +66,16 @@
       color: $gl-text-color;
     }
   }
+
+  .issue-title {
+    margin: 0;
+  }
+
+  .description {
+    margin-top: 6px;
+
+    p:last-child {
+      margin-bottom: 0;
+    }
+  }
 }

app/assets/stylesheets/pages/issues.scss

@@ -132,11 +132,6 @@ form.edit-issue {
   }
 }
 
-h2.issue-title {
-  margin-top: 0;
-  font-weight: bold;
-}
-
 .issue-form .select2-container {
   width: 250px !important;
 }

app/assets/stylesheets/pages/notes.scss

@@ -59,7 +59,7 @@ ul.notes {
       margin-top: 1px;
       border: 1px solid #bbb;
       background-color: transparent;
-      color: #999;
+      color: $gl-gray;
     }
   }
 
@@ -176,8 +176,7 @@ ul.notes {
 
     a {
       margin-left: 5px;
-
-      color: #999;
+      color: $gl-gray;
 
       i.fa {
         font-size: 16px;