Issue #1831892 by dead_arm, nod_: Make Views UI usable on mobile.

core/modules/views/views_ui/css/views-admin-rtl.css

@@ -57,15 +57,17 @@
 
 /* @group Attachment configuration columns */
 
+@media screen and (min-width:45em) { /* 720px */
   .views-display-columns > * {
     float: right;
     margin-left: 0;
-  margin-right: 2%;;
+    margin-right: 2%;
   }
 
   .views-display-columns > *:first-child {
     margin-right: 0;
   }
+}
 
 /* @end */
 

core/modules/views/views_ui/css/views-admin.css

@@ -207,15 +207,22 @@
 
 /* @group Attachment configuration columns */
 
+.views-display-columns > * {
+  margin-bottom: 2em;
+}
+
+@media screen and (min-width:45em) { /* 720px */
   .views-display-columns > * {
     float: left; /* LTR */
     margin-left: 2%; /* LTR */
+    margin-bottom: 0;
     width: 32%;
   }
 
   .views-display-columns > *:first-child {
     margin-left: 0; /* LTR */
   }
+}
 
 /* @end */
 

core/modules/views/views_ui/css/views-admin.theme.css

@@ -608,9 +608,11 @@ ul#views-display-menu-tabs li.add ul.action-list li{
   margin-right: 0.75em;
 }
 
+@media screen and (min-width:45em) { /* 720px */
   #views-ui-preview-form .form-type-textfield .description {
     white-space: nowrap;
   }
+}
 
 /* @end */