[Glitch] Fix autocomplete suggestions being cut off in compose form

Port 6833732852 to glitch-soc

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

app/javascript/flavours/glitch/features/compose/components/compose_form.jsx

@@ -369,7 +369,6 @@ class ComposeForm extends ImmutablePureComponent {
               <PollFormContainer />
             </div>
           </AutosuggestTextarea>
-        </div>
 
           <div className='compose-form__buttons-wrapper'>
             <OptionsContainer
@@ -385,6 +384,7 @@ class ComposeForm extends ImmutablePureComponent {
               <CharacterCounter text={countText} max={maxChars} />
             </div>
           </div>
+        </div>
 
         <Publisher
           countText={countText}

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

@@ -1236,10 +1236,10 @@ $ui-header-height: 55px;
 .compose-form__highlightable {
   display: flex;
   flex-direction: column;
-  overflow: hidden;
   flex: 0 1 auto;
   border-radius: 4px;
   transition: box-shadow 300ms linear;
+  min-height: 0;
 
   &.active {
     transition: none;

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

@@ -43,7 +43,6 @@
 
   .compose-form {
     flex: 1;
-    overflow-y: hidden;
     display: flex;
     flex-direction: column;
     min-height: 310px;