Increase use of variables in css

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

app/assets/stylesheets/base/mixins.scss

@@ -187,7 +187,7 @@
 
     &.light {
       a {
-        color: #777;
+        color: $gl-gray;
       }
     }
   }

app/assets/stylesheets/generic/common.scss

@@ -376,7 +376,7 @@ table {
   list-style: none;
   text-align: center;
   margin-top: 5px;
-  margin-bottom: 19px;
+  margin-bottom: 18px;
   height: 60px;
   margin-top: -18px;
   padding-top: 18px;

app/assets/stylesheets/generic/lists.scss

@@ -109,3 +109,17 @@ ul.bordered-list {
 li.task-list-item {
   list-style-type: none;
 }
+
+ul.content-list {
+  @include basic-list;
+
+  margin: 0;
+  padding: 0;
+
+  li {
+    padding: 18px;
+    border-color: #f1f2f4;
+    margin: 0 -18px;
+  }
+}
+

app/assets/stylesheets/pages/commits.scss

@@ -52,7 +52,7 @@ li.commit {
     }
 
     .commit-row-message {
-      color: #444;
+      color: $gl-link-color;
 
       &:hover {
         text-decoration: underline;
@@ -88,12 +88,12 @@ li.commit {
   }
 
   .commit-row-info {
-    color: #777;
+    color: $gl-gray;
     line-height: 24px;
     font-size: 13px;
 
     a {
-      color: #777;
+      color: $gl-gray;
     }
 
     .committed_ago {

app/assets/stylesheets/pages/events.scss

@@ -14,6 +14,14 @@
       position: relative;
       top: -2px;
     }
+
+    .event-title {
+      line-height: 44px;
+    }
+
+    .event-item-timestamp {
+      line-height: 44px;
+    }
   }
 
   a {

app/assets/stylesheets/pages/projects.scss

@@ -184,7 +184,7 @@ ul.nav.nav-projects-tabs {
 
 .breadcrumb.repo-breadcrumb {
   padding: 0;
-  line-height: 34px;
+  line-height: 42px;
   background: white;
   border: none;
   font-size: 16px;