Cleanup DeckExporter.cs

Remove bool isFullscreen.
Using different co-ordinates for fullscreen/windowed mode is unneeded since using GetClientRec() for determining client co-ordinates.

Get the auto-clicker to clear the search box after finishing export of deck.
Reword GUI label for highlight last drawn card
Merge pull request #133 from dvide/highlight-last-rewording

Reword GUI label for highlight last drawn card
player cards returned from play are no longer counted as "obtained"
Merge pull request #132 from michaelb7k/DeckExporter_Cleanup

Cleanup DeckExporter.cs