refactor(volumes): volume management

issue #1127 

fix(backend): test and checks for old ISOs

issue #1125

feature(frontend): get all fallback files for the package

* wip(frontend): fallback for raphael fixed
* wip(frontend): get original files for fallback
* Also fix tell user to install agent for remote tests
* wip(frontend); version badge

issue #993

It only happened if the ISO cache was removed

issue #993

issue #1123

issue #1123

feature(frontend): fallback bt4 upgrade

issue #993 and #949

* feature(frontend): fallback bt4 upgrade

issue #993 and #949

* feature(frontend): manage pools

issue #1115

* wip(frontend): pass configured timeout when starting

issue #1119

issue #1100

* fix(access): Add access tab
* fix(access): Improve appearance
* fix(access): Add i18n strings

Issue #1098

feature(frontend): reviewed fallback files

issue #993 and #949

issue #1107

* fix(backend): display field and process cleanup

issue #1107

issue #1107

issue #1112