checkbutton node passes mouse input to game loop

[samtsejerome]

Godot version:
3.2.3

OS/device including version:
Macbook pro running macos 10.15.6
Issue description:
my game use mouse input to control the player, and a checkbutton to pause/unpause music, but clicking the checkbutton to change music status makes my player jump - I set the mouse filter to stop for thecheck button but its still an issue. (see attached example project )

Steps to reproduce:

1. create a UI scene with a checkbutton on it
2. 2 instance the UI scene into your main scene
3. assign mouse click to an input via the input map
4. create game logic using newly assigned input

expected result: can use checkbutton without affecting game logic
actual result:
cclicking the checkbutton also results in the input map input being generated influencing gameplay (there doesnt appear to be a way around this.)

checkbutton_issue.zip

Minimal reproduction project:

[Calinou]

Use _unhandled_input() to handle the player's "action" input instead of _input(). This way, input handled by other nodes won't be passed to the player.

[Calinou]

@samtsejerome Did you find a solution to this?