Allow themes to play alternate Game Videos

[Paul R]

Current implementation allows user to put alternate 'platform videos' in a folder like this:

Launchbox\Themes*ThemeName*\Videos\Platforms

It would be great also if a user could use an alternate set of 'game videos' for a selected theme - for example, if a user wants a certain theme to use an alternate set of videos to be used with primarily 'full screen' views for both cinematic 'platform videos' and also game themes that look best in full screen. Example:

Launchbox\Themes*ThemeName\Videos*PlatformName

Then the PlatformName folder could have a subfolder for 'Themes' (just like the normal video folders do), that way a user can still toggle off the 'prioritize theme videos' setting, for even further customization. So for Nintendo Entertainment System as an example:

Launchbox\Themes*ThemeName*\Videos\Nintendo Entertainment System\Themes