* renames eco_withdraws to withdraws
* adds EcoAccountTableFilter
* changes percentage withdraw to surface withdraw --> renames amount to surface
* updates EcoAccountTable
* adds column for rendering rest of available account using a progress bar
* adds progressbar.html to konova/custom_widgets
* adds/updates translations
* moves accessibility of compensations completely into related intervention.users set
* this way the visibility for a compensation can not differ from the one of the 'parent' intervention
* adds UserActionLogEntry model to user/models.py
* wraps user and timestamp info
* can be extended for more information in the future
* refactors all filtering and accessing on values
