feat(windows): make system tray icon a static icon rather than changing with the keyboard (as a flag)

System tray icon changes from "keyman" to installed keyboard if it has an icon.

At that point, there will be two icons which will be same. One in language bar and other in system tray.

One in language doesn't bring configuration on right click,
One in system tray brings the configuration on right click

This can lead to confusion.

Please do not let the keyman engine in system tray change its icon based on the keyboard.

system try icon of Keyman engine must always have its icon.