style fixes to image-drop list in composer window

public/css/style.less

@@ -572,18 +572,20 @@ body .navbar .nodebb-inline-block {
 		}
 		
 		#imagelist {
-		  position: absolute;
+			position: relative;
-      bottom: 5px;
+			bottom: 40px;
-      left: 0px;
+			width: 90%;
-      padding-left:2em;
+			margin: 0 auto;
 
 			div {
 				margin-right:5px;
 			}
+			
 			span {
 				line-height:20px;
 				float:left;
 			}
+			
 			button { 
 				padding-left:5px;
 			}