reduce width of searchbox on mobile, fix overlap, fix #7282
move avatar into clickable area of user menu
do not show display name on mobile when profile picture is present
restrict zooming in to not mangle layout accidentally
remove additional transition rule, reduce width of collapsed search bar
Merge branch 'master' into mobile-header
Merge pull request #7309 from owncloud/mobile-header

Header optimizations for mobile
Merge branch 'master' into sharing-userspathbug