 Version 6.8.7

* clear history really clears it
* fixed deselect all in episodes and podcasts lists
* consolidated OnlineFeed and SearchResults classes to use the common FeedBuilder class
* cleared the error icon on subscription grid
* in Grid view of Subscriptions, click and long-click is received on the entire block of a podcast
* in episodes list of an online feed (unsubscribed), multi-selection of episodes now allows to reserve them
	* once reserved, the episodes are added to a synthetic podcast named "Misc Syndicate"
* fixed PlayerDetailed view showing wrong information or even crashing
* tuned Material3 colorscheme
