Fixed crash when switching All/Inventory Blocks
Fixed deletion host screen not selecting first tab
Advanced fill blocks now show percentage on overlay
Temporarily disabled code to prevent crash
Made changed to advanced fill gui

Remove button changed to Remove Block, made it draw only when a block is
selected
Made change to deletion gui

All Blocks/From Inventory button is now only enabled when the filter
type is anything but "ALL"
Added Delete keybinding, fixed selection tool bugs
Escaping now properly removes current selection