Just some performance optimisation & future proofing! Full details below if you're interested :)

Drawing GUI:

• Fill tool works in a block system rather than individual pixels (128/ratio)²
• Undo-steps is changeable in config.yml (1 step/16kb/active drawer)
• Made ratio mutable as I intend to add zoom in/zoom out while the GUI is open

GUI LIstener:

• Cache colour picker & tools gui cached rather than always reconstruct
• Reconstruct tools gui if tool changes

CustomMapRender:

• Checks if rendered rather ran still reconstruct maps in view on render call

LazyRenderer:

• Rather than maps be all loaded on start up, they now only load when a player is holding or viewing the map.

MapDataStore: -Removed legacy map migration code

• Added LazyRenderer

MapFont:

• Removed redundant M's

Metrics & VanillaMapsPlugin:

• Implemented bStats