1) `Palettes`'s `reindex_colors_on_width_increase()` was not changing the `index` of `PaletteColors`, thus resulting in the opened palette itself and the saved file having different indices, which could've caused conflicts with multiple colors sharing the same index, if the user re-arranged the palette after resizing it.
2) If the width was increased but the height increased, the positions of the colors remained the same, which resulted in the colors being in the columns that were removed, to be removed themselves. Now, the colors are taking advantage of the empty space, in order to remove as less as colors as possible. No colors will be removed if the width times the height is equal to or greater than it was before.
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.
Before this commit, when these tools were being used on large areas, the software would start being very slow due to the polyline drawing. Now it simply draws an image.
TODO:
- Optimize the lasso, pixel and polygon select tools
- Mirror the previews of ellipse selection and shape tools, for consistency with the lasso, pixel and polygon select tools
- Perhaps somehow remove Previews.gd since its work is even more limited now.
* 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
* Add setting for Godots low processor usage mode
* Update name and description of low processor usage mode setting in preferences
* Fix a tiny mistake
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)
