Moderation menu #310

Implements dropdown menu as per #310 (closed) discussion.

Video: https://cl.ly/bdd468fe1e58, menu auto-positioning: https://cl.ly/88373da97854 (the auto-positioning is optional FWIW)

Complementary backend MR for changing activation status API: pleroma!843 (merged)

Additional backend MR needed for the "deactivated" status in the user view pleroma!874 (merged) (should be merged first, the FE depends on it)

Visibility table. If an action is not applicable to the given user type, FE doesn't show it in the menu.

I have run tests on internal and external users to see which actions are applicable to which user type but corrections are welcome!

Menu item	Applicable to user type	Video
Grant Admin	local	local user
Grant Moderator	local	local user
Deactivate account	local and external	local user external user
Delete account	local and external	local user external user from timeline
Force posts to be NSFW	local and external	local user external user
Force posts not to have media	local and external	local user external user
Force posts to be unlisted	local and external	local user external user
Force posts to be followers-only	local and external	local user external user
Disallow following user from remote instances	local	local user
Disallow following user at all	local

"Disallow user posts from federating" - apparently it's not implemented yet, should we add it later?

Screenshots for different themes

Themed dropdown menu	Themed Delete User dialog
Pleroma Dark	Pleroma Dark
Pleroma Light	Pleroma Light
Classic Dark	Classic Dark
Bird	Bird
Ir Black	Ir Black
Monokai	Monokai
Mammal	Mammal
Remond XX	Redmond XX
Breezy Dark	Breezy Dark
Breezy Light	Breezy Light

Mobile: Light menu, Dark menu, Light Delete User dialog, Dark Delete User dialog

Mobile Video: https://cl.ly/115b0517fe3f

src/boot/after_store.js

@@ -210,6 +210,7 @@ const getNodeInfo = async ({ store }) => {
 
       const frontendVersion = window.___pleromafe_commit_hash
       store.dispatch('setInstanceOption', { name: 'frontendVersion', value: frontendVersion })
+      store.dispatch('setInstanceOption', { name: 'tagPolicyAvailable', value: metadata.federation.mrf_policies.includes('TagPolicy') })
     } else {
       throw (res)
     }