Documents removing

* adds generic modal rendering using package django-bootstrap-modal-forms
* adds document file removing from hard drive
* adds translations

konova/contexts.py

@@ -23,6 +23,7 @@ class BaseContext:
         "user": None,
         "current_role": None,
         "help_link": HELP_LINK,
+        "modal_reload_page": "true",  # must be string and lower case true, since it's used in JS code
     }
 
     def __init__(self, request: HttpRequest, additional_context: dict = {}):