Android editor - Improve UX

[anonimo82]

User eXperience should be improved in the Godot's editor Android port, I propose to use this scheme for mouse emulation:

• Tap: left click
• Double tap: double click
• Long tap: Right click
• Double tap and drag: left click and drag
• Drag/swipe: scroll
• Pinch: zoom (where applicable)
• back button: exit editor and return to the project list, or exit the project list, or dismiss topmost dialog

Double tap should have a longer time out, it's nearly impossible to open a folder from a file manager to pick a file from. And by the way, selecting elements (files, nodes, etc) should be done with single tap.

That's it, I hope this helps.

[anonimo82]

Just realized this could also be used in "regular" Windows machines, like the Surface tablets, which has a touch screen too.
Not 101% sure, but I guess some Mac laptops has it too.