Removed the "frame_container" property from Layer.gd, which used to hold a reference to a node, leading to orphan nodes being created and never freed. Memory management seems to be working okay now. Previously, every time the user made a change, memory kept going up and never coming down. Now, data that can never be recovered, like undo data that have been rewritten in history, are also removed from memory.
* gdformat .
* Lint code - Part 1
* Format code - Part 2
* Lint code - Part 2
Trying to fix the max allowed line length errors
* Add normal_map_invert_y to the image .import files
Because of Godot 3.4
* Do not call private methods outside of the script's scope
Lint code - Part 3
* Format code - Part 3
* Fixed more line length exceeded errors - Lint code Part 3
* Export array of licenses - Lint code part 4
* Clean hint_tooltip code from Global
Removes a lot of lines of code
* Create static-checks.yml
* Fix FreeType's license
* Fix for multiple cel selection issue
Now it will only apply selection to the selected cels that are **visible and unlocked**
* Fix for loss of selection data
This will hopefully fix the selection data loss on toggling layer buttons
A Project class contains project-specific data like name, undo_redo, frames, layers, tags and brushes. These variables have been moved from Global. This is the first step towards multiple tab support, where each tab will be a different Project.
The Canvas is now single node, instead of having multiple canvases for each frame. This should also be a performance optimization, since there are less canvas nodes, so there are less _input() calls. It should also fix a rare Undo/Redo issue with motion drawing and making lines. Could be unstable, needs more testing.
As a side effect, the guides are now the same for all frames, so this should also close #246.
