Loss of focus on inputs updating wrong AtlasTexture resource

[BeeOProblem]

Found on stream when working on The Forgetful Apprentice.

1. Have at least two textures
2. Modify one
3. Select the second texture
4. The second texture will have at least one dimension forced to match the first

I suspect this is caused by a loss of focus or possibly value change signal happening and/or taking effect after the selected texture is changed. This action should either be handled before the selected texture change or should affect the previously selected texture by remember what it is/was.

[BeeOProblem]

Root cause appears to be a bug with Godot engine in 4.3 and possibly newer.

SpinBox will partially retain its old value when its value is changed by set_value_no_signal and then act as if it had its value changed from what it was set to to a new value when losing focus. Workaround is to ignore these changes.