history rework

[bitshiftersgmbh]

complex rework of yform manager history views, both list and details view

• adding missing and new translations in 4 languages (TODO: pt_br)
• comparison based on field type (complex diff with <del> and <ins> for text/textarea values)
• for technical reasons (comparison with prev revision) changed sorting to timestamp ASC
• details modal view with icons, tooltips (file type) and grouping changes/added/removed/unchanged into accordion panels