Excluded groups in Workflow

props to @jbxonline
Better check if the page is in dashboard
Fix incorrect object to check
avoid get image call in case there's no background picture
Add reset method to territory lists
Only reload data if locale changed
Better sanitize values
Fix selected file sets in File Manager dialog when using ConcreteAssetLibraryHelper
Notify user on attempt to load an invalid package

Use the log to provide feedback to the user when attempting to load
packages that are not correctly configured. This is mainly of benefit
when using the interface at index.php/dashboard/extend/install to
install new packages:

- If your Package class sets $pkgHandle to a value other than
  the package directory, concrete5 isn't able to load the package when
  you click "install". Previously this was a silent failure - nothing
  happened when you clicked the install button, the package just
  remained in the "Awaiting Installation list". Now the user is notified.

- If a Package class name doesn't follow the expected convention, the
  package won't appear at all in the "Awaiting Installation" list. In
  this situation, the user now has access to some debug information.
Fix t() usage in 57f065b
Version update
Merge pull request #1821 from hissy/helper-dashboard

Better check if the page is in dashboard
Merge pull request #1839 from mattduck/notify-on-invalid-package-load

Notify user on attempt to load an invalid package
Merge pull request #1824 from Remo/avoid-image-get-call

avoid get image call in case there's no background picture
Fixes error with full page caching on long file paths
https://github.com/concrete5/concrete5/pull/1813 adds the required attribute to the CAPTCHA input field. However, when saving the form block with the CAPTCHA enabled, this required attribute stops the changes being saved unless you preview and supply a value in the CAPTCHA field.
Merge pull request #1842 from JeRoNZ/master

https://github.com/concrete5/concrete5/pull/1813 adds the required attri...
Inspect audio and video files
Remove debugging line
Merge pull request #1843 from mlocati/inspect-video-audio-files

Inspect audio and video files