* Allow copy of templates from secondary storages of other zone when adding a new secondary storage
* Add API param and UI changes on add secondary storage page
* Make copy template across zones non blocking
* Code fixes
* unused imports
* Add copy template flag in zone wizard and remove NFS checks
* Fix UI
* Label fixes
* code optimizations
* code refactoring
* missing changes
* Combine template copy and download into a single asynchronous operation
* unused import and fixed conflicts
* unused code
* update config message
* Fix configuration setting value on add secondary storage page
* Removed unused code
* Update unit tests