Small dialog improvements

skins/elastic/styles/layout.less

@@ -20,6 +20,8 @@
 
 @taskmenu-width:        70px;
 
+@layout-header-height-mobile:    2.5rem;
+
 /*** Responsive design - Layout ***/
 
 /*

skins/elastic/styles/widgets/jqueryui.less

@@ -77,7 +77,12 @@
         }
 
         .ui-dialog-titlebar {
+            height: @layout-header-height-mobile;
+        }
 
+        .ui-dialog-title {
+            line-height: @layout-header-height-mobile;
+            font-size: 1rem;
         }
 
         .ui-dialog-content {
@@ -91,10 +96,14 @@
             padding: 0 !important;
             text-align: center !important;
 
-            .ui-dialog-buttonset button {
+            .ui-dialog-buttonset {
+                display: flex;
+
+                button {
                     margin: 0 !important;
                     border: 0 !important;
                     box-shadow: none;
+                    flex-grow: 1;
 
                     &:before {
                         display: block;
@@ -116,3 +125,4 @@
             }
         }
     }
+}