re-fixes loader bar styling

src/Umbraco.Web.UI.Client/src/less/main.less

@@ -518,6 +518,11 @@ height:1px;
 }
 
 .umb-loader-wrapper {
-    overflow:hidden;
-    position:relative;
+    
+    position: absolute;
+    right: 0;
+    left: 0;
+    margin: 10px 0;
+    overflow: hidden; 
+
 }

src/Umbraco.Web.UI.Client/src/less/modals.less

@@ -55,14 +55,6 @@
 	position: absolute;;	
 }
 
-/* re-align loader */
-.umb-modalcolumn .umb-loader-wrapper{
-    position:relative; 
-    margin: 20px -20px;
-}
-
-
-
 /* umb.dialog is used for the dialogs on the conent tree*/
 .umb-dialog {
 	outline: none;

src/Umbraco.Web.UI.Client/src/less/panel.less

@@ -232,13 +232,6 @@
   display: none; 
 }
 
-/* re-align loader */
-.umb-panel .umb-loader-wrapper{
-    position:relative; 
-    margin: 20px -20px;
-}
-
-
  // Utility classes
 
  //SD: Had to add these because if we want to use the bootstrap text colors

src/Umbraco.Web.UI.Client/src/less/tree.less

@@ -404,14 +404,6 @@ div.is-container:before{
 // Loading Animation 
 // ------------------------
 
-.umb-tree .umb-loader-wrapper {
-overflow:hidden;
-position:absolute;
-left:0;
-right:0;
-margin: 10px 0;
-}
-
 .umb-tree li div.l{
 width:100%;
 height:1px;