Update 'Properties Layout.xml' to 1.8.1
Add LongProperty to support new 'max-tick-time' property
Properties Layout.xml: Move property alphabetically
Only notify if there is MORE properties than registered
Load lists & worlds if loading properties was successful
Fix small typo
Add generic edtior for unregistered properties

Handles all unregistered properties as StringProperty, so they can be
set to pretty much anything
Remove unregistered properties warning
Show unregistered properties count on button

- Also hide if there is none
Set NumericUpDown value AFTER setting Min/Max
Fix LongProperty not being editable and not saving
Fix ItemProperty value check