* prevent that items will be marked as exported if invoice can not be generated
* check for existing invoice number to prevent that invalid invoices will be generated
* allow to add a unique id to invoice preview files on batch export
* hide delete invoice action with deactivated permission
* try to automatically fix duplicate invoice id
* calc once, then re-use
* prevent invalid theme switch
* allow to turn off weekly-quick-entries by permissions
* remove 00:00 from date-times that likely do not need a time
* fix datepicker out of window
* make duplicate project action available on details page
* move "weekly hours" form to main menu
* changed label of week chooser
* hide quick entries menu for punch mode users
* improved play and stop button if only one record is allowed
* stop button first in action menu
* fix skin colors
* autofocus term field in search form
* fix responsive column layout in invoice listing
* improve responsive header for small screens
* improve report visibility
* fix timesheet duration, which breaks validation
* added contributing section in README
* do not allow to change project for existing activities - fixes#2576
* bump theme version to fix FOSUserBundle dependency
* use entity color instead of inherited one - fixes#2200
* fix: display time budget in customer listing if set
* updated api methods with annotations
* do not require checkboxes for system configurations
* open dialog for duplicated timesheets
* removed un-maintained docker file
* update all packages
* fix deprecations
* only show one line descriptions for customer, projects and activities
* allow to show export column in timesheet listing
* set default times for daterange objects
* allow to show order and order by fields
* move search to modal
* more options for page size
* save export visibility in cookie
* make voters a final class
* upgrade dependencies
* sort project alphabetically in dashboard widget
* open detail page on row click
* do not break on null tag name
* added max height to scrollable widgets on dashboard
* added timesheet duplicate event
* allow to deactivate browser title update
* improve comment box
* moved role permissions to own menu
* removed tabs in user screen
* fix user can remove super-admin from own account
* do not close modal if form is dirty
* deprecated TimesheetConfiguration
* inject timezone in form types
* cleanup usage of UserDateTimeFactory
* allow to configure increment steps for minutes
* use 15 minutes step for datetimepicker in project edit form
* use rounding rules for increments in minute select for begin and end
* allow duration in multi user and admin timesheet forms
* make dropdown values configurable
