* Blend group layers on `DrawingAlgos.blend_layers()`
* Support group layer blending on the canvas
* Allow editing of group layer properties
* Fix issues with group layer blending in canvas, and unite common code
* Group layers can now be used as clipping masks
* Make move tool preview work on child layers
* Change OffsetImage's `blend_layers()` to support group layer blending
* Support group layer blending in the canvas preview
* Fix layer blending mode, clipping mask opacity and cel opacity not being updated automatically if the layer/cel changed is not selected
* Add a pass through blending mode to layer groups
Fingers crossed that no bugs were introduced
* Fix issue with layers that belong to pass through groups not updating their textures on the canvas automatically on undo
Thanks to https://godotshaders.com/shader/color-manipulator/
The shader has more options than just brightness and contrast though, but I didn't know how else to name the effect. "Adjust Brightness/Contrast" makes it immediately obvious as to what the effect is about.
Closes #1061, fixes issue where when Pixelorama's window loses focus, the dialogs disappeared, but the dialogs can no longer close when pressing outside of them.
* splash ambient
* change fill to radial
* make import tag work with frame button
* hide Import tag dialog when clicking outside
* Icon shows the first frame of a tag
* formatting
Added missing strings to Translations.pot and fixed a few ones that were broken either because of missing periods, differences in capitalization or because of trailing newlines (the latter seems to get automatically trimmed in tooltips during runtime)
This will allow us to implement shearing more easily. Also, for the non-SmearRotxel shaders, normalize their pivot in GDScript, before passing it to the script. Should probably be faster this way
Pixelize makes the image pixelated, and Palettize maps the color of the input to the nearest color in the selected palette. Useful for limiting color in pixel art and for artistic effects.
Probably temporary, it might be a good idea to add a third "Data" tab in the export dialog, if we add stuff like exporting to Godot resources, such as AnimatedSprite, AnimationPlayer etc.
Allows users to change project name and add custom user data. I was not sure where to put this, so I put it under the Edit menu. It might be a good idea to add a new "Project" menu in the future, and perhaps Scale Image, Resize Canvas and Crop to Content/Selection could be placed there, as they always affect the entire project.
