* Don't do the unbelievable bad use of a MutableBlockVector2 in the creation of a set
- FixesIntellectualSites/PlotSquared#3683
* Clean up remnants of the use of MutableBlockVector2
* If a char mask is successfully created from the full input, return it
* Don't double-up adding a block to a BlockMaskBuilder (if adding by regex is successful)
- InputParseException is thrown if unsuccessful
* Fix optimisation of BlockMask for negation of a single block type
- Fixes#1755
* Allow early returning of an optimized MaskIntersection to avoid unnecessary work
* Actually allow underscore in isAlphanumericUnd
- Fixes#1626
* Replace a few more hard-coded air internal IDs
* Don't fail silently if BlockMaskBuilder#addRegex doesn't work when testing all block types
* Remove unused import
* Fix horrendous variable assignment in PNGWriter
- Fixes#1679
* More detailed information on PNG format
* Avoid a larger number of blocks that do nto have a color assigned in TextureUtil
* Don't error in PNGWriter if biomes aren't saved to clipboard and grass is present
* Only implement cache to MaskingExtent when off main thread
- It's possible for a [Chunk/Char]FilterBlock to be used multiple times in the same "tree" of method calls meaning the mutable paramets (particularly index) get increased within a loop, causing AIOOBs and other issues
- This is only possible on the main thread due to the handling of submissions in SingleThreadQueueExtent, as it ensures all operation remains on the main thread to prevent deadlocks
- Therefore safe usage of FilterBlocks requires that main-threaded operation create a new [Chunk/Char]FilterBlock instance each time
- Further fixes#1681
* Fix typos
* Switch to LongFunction
* Only synchronise tree generation at the very lowest level
- Fixes#1681
* Perform the generate inside try-finally and actually use the resultant copied map to place blocks to the editsession
* Check result of generateTree and return null if failed
* Implement limits to image size and load times
- Prevents issues caused by users attempting to load large images
- Implements #1729
* Check dimensions given before attempting to load image
