Replace spacebar-to-play with double-click

Opening the selected file's default player is now triggered by
double-clicking the file queue row or a track table row, instead of
pressing Space. The Delete key still removes selected queue items.

Double-clicks on the track table's Copy checkbox column are ignored
so rapidly toggling it doesn't also launch the player.

Futonizer.csproj

@@ -9,8 +9,8 @@
     <ImplicitUsings>enable</ImplicitUsings>
     <AssemblyName>Futonizer</AssemblyName>
     <RootNamespace>Futonizer</RootNamespace>
-    <Version>1.0.10</Version>
-    <FileVersion>1.0.10.0</FileVersion>
+    <Version>1.0.11</Version>
+    <FileVersion>1.0.11.0</FileVersion>
     <ApplicationIcon>Assets\app.ico</ApplicationIcon>
   </PropertyGroup>