Attach DEACTIVATE/ACTIVATE events to stage.nativeWindow.

[MAJigsaw77]

As of the recent changes to OpenFL's NativeWindow (openfl/openfl@31e6f2e and openfl/openfl@48e150e), an issue on mobile has been fixed where DEACTIVATE and ACTIVATE events were not being called properly when user presses the power button, putting the phone into sleep mode.

This PR ensures that the events are now attached to stage.nativeWindow instead of the stage alone. The change doesn't affect other platforms (the events will continue to function as before). However, until the next OpenFL release, this fix won't take effect.

[Geokureli]

Is there a reason why the event is no longer dispatched from the stage, with this change? Or rather, why didn't the fix make it so that the event is dispatched through the stage, as expected?

[MAJigsaw77]

Is there a reason why the event is no longer dispatched from the stage, with this change? Or rather, why didn't the fix make it so that the event is dispatched through the stage, as expected?

Tbh, i was confused as well but they don't wanna fix the stage to dispatch these events but instead they fixed the nativeWindow so ¯⁠\⁠_⁠(⁠ツ⁠)⁠_⁠/⁠¯.

[Geokureli]

My specific concerns are:

• Will this code work in both the newest and oldest allowed versions of openfl/lime and for all targets?
• What changed and on what version?
• Do we need to check openfl version here to determine where to listen for these events

Currently, our minimum supported openfl version is 9.2.2 and minimum lime is 8.0.2. If needed, we can raise those but it doesn't seem necessary, here

[MAJigsaw77]

My specific concerns are:

• Will this code work in both the newest and oldest allowed versions of openfl/lime and for all targets?
• What changed and on what version?
• Do we need to check openfl version here to determine where to listen for these events

Currently, our minimum supported openfl version is 9.2.2 and minimum lime is 8.0.2. If needed, we can raise those but it doesn't seem necessary, here

• The code in the nativeWindow would work just like the stage's events as they are attached to the window callbacks just like the stage.
• The changes to the nativeWindow have been made on these commits (openfl/openfl@31e6f2e and openfl/openfl@48e150e).
• As of my latest change to this pr, the code should work just fine for the minimum required openfl version.

[Geokureli]

Thanks, and thanks for looking into my concerns

[dimensionscape]

We didn't change the behavior of Stage, I just fixed an issue with NativeWindow. We may apply a similar fix to Stage if it is appropriate as well.