[Feature Request]: Add editor mask tool

[kamerosoul]

Is there an existing issue for this?

• I have searched the existing issues and checked the recent builds/commits

What would your feature do?

The existing mask clear tool , deletes all existing mask. When drawing mask in some cases touches wrong area. To fix it, existing mask clear tool deletes whole existing mask. Please add an option to clear or edit only an specific part of existing mask. So, no need to repeat all manual detailed mask every time. Specially when you need to test several times to find best results.
This feature will save a lot of time for inpainting

Proposed workflow

1. Go to .... input image - inpaint or outpaint - drop image - draw a mask
2. Press .... clear tool : Whole detailed existing mask is deleted! (Good for some cases, but sometimes we need to fix only a detail)
3. ... Proposed: add and additional mask editor tool to draw mask portion to be deleted

Additional information

No response