October Surprise

[davidnewhall]

• Fixes a bug not being able to delete Transmission and Qbit integrations.
• Adds custom command output to the console window that appears.
• Sends service state changes when they occur (and not on a separate interval).
• Closes Snapshot Nvidia unable to leave blank path #836 by adding a note about the CUDA image to the Nvidia integration page.
• Closes Adjust error message when testing plex if possible #821 by adding Plex response code to UI test output.