[Glitch] Fix floating action button obscuring last element

Port 5a448d0d71 to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/features/ui/components/columns_area.js

@@ -234,7 +234,7 @@ class ColumnsArea extends ImmutablePureComponent {
             </div>
           </div>
 
-          <div className='columns-area__panels__main'>
+          <div className={`columns-area__panels__main ${floatingActionButton && 'with-fab'}`}>
             {!navbarUnder && <TabsBar key='tabs' />}
             {content}
             {navbarUnder && <TabsBar key='tabs' />}

app/javascript/flavours/glitch/styles/components/single_column.scss

@@ -233,6 +233,10 @@
   .columns-area__panels__pane--compositional {
     display: none;
   }
+
+  .with-fab .scrollable .item-list:last-child {
+    padding-bottom: 5.25rem;
+  }
 }
 
 @media screen and (min-width: 600px + (285px * 1) + (10px * 1)) {