[4.x] Revert stopping propagation of Popover clicks

[jasonvarga]

First, a background. 😂

• In [4.x] Popovers now stop click propagation #7844, we disabled propagation of clicks on the popover trigger element to fix [4.x] Assets can only be selected when clicking the thumbnail #7840.
• Stopping propagation like this prevented v-on-clickaway from working, which caused the following issues:
  • [4.x] Overlapping replicator popovers  #7861.
    • Fixed in [4.x] Fix Replicator set pickers not closing when opening a second one #7862 by adding a prop.
  • [4.x] Filter doesn't close automatically #7898
    • Fixed in [4.x] Fixes #7907 by using that prop.
  • If you have a dropdown list open, and you open a second, the first one stays open. (This PR fixes that)

So, this PR reverts stopping propagation since it caused more problems.

Instead, this fixes the original #7840 issue in a different way. Rather than the entire asset tile be clickable (including the twirldown), just wrap the clickable bits in a new div, attach the handlers to that, and let the twirldown sit on top.

Visually:

Tile (click handlers here)
    Dropdown
    Image
    Filename

becomes

Tile
    Dropdown
    Wrapper (click handlers here)
        Image
        Filename

Now since the twirldown is not a child, when you click it, the event won't bubble up causing the asset to be selected.

[what-the-diff]

PR Summary

• Removed stopPropagation prop from Popover.vue component
  In the Popover.vue file, the unnecessary stopPropagation prop was removed to simplify the code.
• Updated click event listener in Browser.vue
  The click event listener on an asset thumbnail in the Browser.vue file now uses the .stop modifier for better event handling.
• Simplified popovers in Filters.vue
  In Filters.vue, two popovers were updated by removing the :stop-propagation="false" attribute, allowing it to use the default value instead.
• Restored stopPropagation default value in SetPicker
  The stopPropagation value for SetPicker in the replicator fieldtype was set back to its default value of false, correcting a previous modification.