Fix clickable blank space in admin table actions

There were times when some actions had text expanding over two lines
while other actions had text on just one line.

Since all the items in a row had the same height, the elements with just
one line added a blank second line. This was obvious when hovering with
the mouse or focusing on the element with the keyboard. It looked weird
when the element received focused, and it could also lead to
unintentional clicks when clicking on the blank space below the element.

app/assets/stylesheets/admin/table_actions.scss

@@ -1,4 +1,5 @@
 .admin .table-actions {
+  align-items: flex-start;
   display: flex;
 
   > :not(:first-child) {