Feat/automated backups (#2142)

* initial restructuring

* very cool

* new structure in place

* delete unnecessary T

* down the rabbit hole

* getting better

* dont like it

* nice

* very nice

* sessions select all

* nice

* backup runs

* fix targets and more

* small improvements

* mostly working

* address PR comments

* fix error

* delete issue with merge

* fix checkboxes and add API for deleting backup runs

* better styling for checkboxes

* small button in ssh kpage too

* complete multiple UI launcher

* fix actions

* present error toast too

* fix target forms

frontend/projects/setup-wizard/src/app/modals/cifs-modal/cifs-modal.page.scss

@@ -13,8 +13,4 @@ ion-item {
 
 .item-has-focus {
   --background: var(--ion-color-dark-tint) !important;
-}
-
-ion-modal {
-  --backdrop-opacity: 0.7;
 }