Support Multiple Simultaneous Touches

[AntumDeluge]

💡 Describe your idea

There is currently partial support for this. An example is that you can use one finger to control player movement with joystick/d-pad & another simultaneously to tap on entities in the viewport. Support was also recently added to quick menu buttons ( ccb16cb a310578 ). Next I am trying to add support to inventory slots.

Support added for:

• item inventories (support was reverted with 5f566f8 due to affecting drag-and-drop)
• viewport
• quick menu buttons
• dialog windows, buttons, & other DOM elements

🔬 Motivation

Better mobile experience making managing gameplay elements more efficient.