Fix padding and margin of .content and .controls

refs #7876

public/css/icinga/layout-structure.less

@@ -157,10 +157,6 @@ html {
   padding: 1em;
 }
 
-.controls + .fake-controls + .content {
-  padding-top: 0;
-}
-
 .dashboard .content {
   padding: 0;
   overflow: auto;

public/css/icinga/main-content.less

@@ -118,7 +118,6 @@ table.avp a:hover {
 
 /* Definitively monitoring-only: */
 table.objectstate {
-  margin: 1em;
   border-collapse: separate;
   border-spacing: 1px;
 }
@@ -194,11 +193,6 @@ table.benchmark {
   color: inherit;
 }
 
-/* controls have no padding as of tabs */
-.controls > h1 {
-  margin-right: 1em;
-}
-
 [class^="icon-"]:before, [class*=" icon-"]:before {
     text-decoration: none;
 }

public/css/icinga/tabs.less

@@ -7,6 +7,7 @@ ul.tabs {
 
 .controls ul.tabs {
   margin-left: -1em;
+  margin-right: -1em;
   margin-top: -3.54em;
   height: 2.6em;
   overflow: hidden;