Cloud-Update

New feature:

• download custom invoice templates
• reload twig/pdf templates from UI
• move recent activities to modal
• added help page for all registered locales
• improved responsiveness in XS

Improvement:

• removed unused duration_only mode
• hide duration stat if duration = 0 (timesheet, invoice, export)
• remove deleted timesheets from bookmarks
• configurable homepage redirect with invalid name
• format duration without leading zero in hours (unify javascript with php behavior)
• active records in all screen sizes
• invoice number for customer null fields
• javascript respects multiple recent-activity dropdowns
• search filter is always marked as active
• only stop entries if new one is running
• validator was tampering with timesheet duration
• updated translations