Fix popovers cutting off in notifications #809

fixes #809 (closed) and also copies over the new popover improvements from chats mr by @eugenijm to debloat that review a tiny bit

the ellipsis menu popover as well as account extra actions had the problem, so I fixed it in both

in notifications:

and when there's space:

src/components/account_actions/account_actions.vue

@@ -3,6 +3,7 @@
     <Popover
       trigger="click"
       placement="bottom"
+      :bound-to="{ x: 'container' }"
     >
       <div
         slot="content"