Feature/password protected export (#689)

* Simplify password protected file format

* no items to import is not an error

* Await inner importer

* Add export format type

* Error if import file is password protected

* Update tests

* Test password protected with normat json importer

* Simplify imports

* Ignore code coverage directory

* Expand importer options  without changing display options

* Import password require import error handling

* Use interface

* Fix curlies

* linter fixes

* Add null of empty util

* Lint fixes

* run prettier

* Move import options to separate enum file

* Fix imports

spec/common/services/export.service.spec.ts

@@ -172,10 +172,6 @@ describe("ExportService", () => {
         expect(exportObject.passwordProtected).toBe(true);
       });
 
-      it("specifies format", () => {
-        expect(exportObject).toEqual(jasmine.objectContaining({ format: jasmine.any(String) }));
-      });
-
       it("specifies salt", () => {
         expect(exportObject.salt).toEqual("salt");
       });