Fixes #19047 - unify date formats

This introduces two new helpers for printing date in absolute and
relative format. Helper for absolute accepts also a parameter to choose
between long and short variant. The long one includes the year. The date
also has a title so you see the other format after hovering mouse...

Fixes #20240 - fix fullscreen mode in ace editor

Fixes #20739 - use unique user label in select

Fixes #20657 - make proxy labels bold

Fixes #20701 - Subnet6 fields info in GET api/v2/hostgroups/:id

Fixes #20711 - GET host interface API will show fqdn attribute

Fixes #20668 - capitalize cards on smart proxy page

Fixes #20675 - autosign delete buttons are no longer red

Fixes #20680 - Use default button style for "Add Combination"

Fixes #20673 - Move locked warning on template editing

Moving it to the top above name to be more visible.