Launch in a virtual desktop

This will stop crashes when alt-tabbing and switching from fullscreen.
It will fix #2 on xorg systems. No idea about wayland. This needs
checked and worked around.
It pulls in some x utilities which may not be desirable.

snap/scripts/sommelier

@@ -29,9 +29,13 @@ function launch_app() {
  mkdir -p "${WINEPREFIX}/drive_c/users/${USER}/My Documents/TmForever/Config"
  touch "${WINEPREFIX}/drive_c/users/${USER}/My Documents/TmForever/Config/GfxDevicePerfs.txt"
 
+ # Get the native resolution. Creating a virtual desktop the same size will
+ # eliminate bugs when switching from fullscreen to windowed mode
+ NATIVE_RES=$(xrandr -q | awk -F'current' -F',' 'NR==1 {gsub("( |current)","");print $2}')
+
  # If we don't change into the program directory some assets may not be found
  cd "${WINE_DIR}"
- env WINEARCH="${WINEARCH}" WINEPREFIX="${WINEPREFIX}" "${WINELOADER}" "${WINE_EXE}"
+ env WINEARCH="${WINEARCH}" WINEPREFIX="${WINEPREFIX}" "${WINELOADER}" explorer /desktop="virtual","${NATIVE_RES}" "${WINE_EXE}"
 }
 
 function prepend_dir() {

snap/snapcraft.yaml

@@ -211,6 +211,7 @@ parts:
  - unzip:i386 # winetricks
  - wget:i386 # winetricks
  - yad:i386 # winetricks
+ - x11-xserver-utils:i386 # for xrandr to set virtual desktop
  override-build: |
  snapcraftctl build
  rm -rf $SNAPCRAFT_PART_INSTALL/etc/init