tja-develop branch PR (When a Sitecore instance is selected you can install/uninstall SPS)

[sc-TylerJass]

This adds functionality to install/uninstall Sitecore publishing service.

To install/uninstall you must select a Sitecore instance, and go to the "Edit" tab, or right click the instance and final the SPS install in the context menu.

When installing, the connectionstrings from the instance that was selected are used in the publishing service. The publishing service module still needs to be installed via the Installation wizard after the service has been installed (as usual).

[sc-TylerJass]

@sc-TylerJass Note to self. Now that SPS instances are visible, some other options are available to them in the Context menu. Need to validate whether or not these options work. Non-working options should most likely be hidden for SPS instances.