Region editor minor issues.

[Kiaazad]

Godot version

4.1

System information

windows 10

Issue description

There are a couple of small issues with region editor.

• The window doesn't hold size and resets to default when opened
• When zoomed, the image inside the newly opened window jumps to default position at the first click

And I have a suggestion that can mitigate those two issues and improve the workflow immensely.

• Add a save as button to the region editor.

This small change will saves us tons of clicks and going back and fourth between windows. The save as can get the resource type and name from the resource that it was opened from.

Steps to reproduce

• open region editor
• resize and move the window
• zoom and move the image inside
• close
• open the region editor again
• try to drag a region

Minimal reproduction project

[Calinou]

• When zoomed, the image inside the newly opened window jumps to default position at the first click

This is already being tracked in godotengine/godot-proposals#7185.

Please open a proposal for remembering zoom in the region editor. There are already similar proposals for other editors such as godotengine/godot-proposals#7021 and godotengine/godot-proposals#2335, but it should be tracked in its own proposal as the exact implementation will differ.