[stable11] popovermenu backport

[skjnldsv]

Backport of the corrected popovermenu.

Main ref: #3024#3118#3035
Additional ref: nextcloud/contacts#101

Tests: file action popover, calendar popover, user personal info privacy popover, mail account popover...

@nextcloud/designers

[skjnldsv]

@nextcloud/designers bump

[codecov-io]

Codecov Report

Merging #3286 into stable11 will increase coverage by <.01%.

@@ Coverage Diff @@## stable11 #3286 +/- ##
============================================
+ Coverage 57.13% 57.14% +<.01% 
============================================
Files 1206 1206 Lines 72718 72718 Branches 1235 1235 ============================================
+ Hits 41550 41553 +3 + Misses 31168 31165 -3

Impacted Files	Coverage Δ
lib/private/Server.php	92.72% <ø> (+0.16%)	✅
lib/private/Files/Storage/DAV.php	7.32% <ø> (+0.23%)	✅
lib/private/Files/Cache/Propagator.php	96.2% <ø> (+1.26%)	✅

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[MorrisJobke]

Tested and looks good :)

[skjnldsv]

Bump? 🐤

[nickvergessen]

Backporting this will break all apps that use this?

[skjnldsv]

@nickvergessen no it should not change a thing since most of the app were sort of close to the css guidelines. But it will greatly increase compatibility between stable11 and 12 for the popover! :)

[LukasReschke]

I'd say let's merge it for now and if we see massive problems in the RC we can revert it again.

[skjnldsv]

Youhouuu! :D