add auto-rotate button using detected guide lines

[facorazza]

Add an auto rotate button to the rotation slider that uses detected structure lines to compute the best rotation angle.

Also always apply the crop values in commit_params so the result is visible immediately without needing to leave the module

[TurboGit]

Isn't this a duplicate of #21024?

[wpferguson]

I tested this an it has several issues

• I'm not sure a magic wand icon is the correct icon for this. The usual use for the magic wand is making a selection
• If the R&S module is open when you load an image into darkroom pressing the icon has no effect. Pressing it a second time does the rotation. Collapsing the module does a second rotation.
• Sometime the action doesn't perform the crop.
• Sometimes the structure lines remain after the module is closed
• Sometimes the structure lines remain after the rotation is applied and the image is cropped.

I tested for about 5 minutes and only got it to work correctly once or twice.

[facorazza]

Isn't this a duplicate of #21024?

yes this is a duplicate sorry