Similar to #1196

Issue details

If a game is paused for a long time, after resuming, Gdx.graphics.getDeltaTime() will give the delta of the entire pause duration. This causes freeze/stutter on resume as the game tries to process possibly hours worth of delta. This was fixed for the android version but not for iOS which makes it inconsistent across backends.

Version of LibGDX an

Steps to reproduce:

1. start game
2. click cingle player
3. create (or select) a character
4. click the right-mouse skill button (near mana globe)
5. select a skill that has a player animation (try several, not sure we implement everything yet...)
6. right click to cast somewhere on the map

When casting a skill, the player animations currently start and finish almost immediately, only dis

Maintainers, it's possible to have two keyboard shortcuts at the same time. For now, we have this PR implementing Inkscape style shortcuts

1. canvas-zoom-in   : =
2. canvas-zoom-out : -
3. canvas-zoom-fit   : 0

The above new canvas zoom shortcuts is already paving way for UX consistency for issue #1122

However, if you want to keep the legacy style

1. canvas-z

Hey, when trying to use

   dest := image.NewPaletted(bounds, palette.Plan9)
   canvas := draw2dimg.NewGraphicContext(dest)

I crash with

panic: Image type not supported

goroutine 70 [running]:
github.com/llgcode/draw2d/draw2dimg.NewGraphicContext(0x7f18c0, 0xc420096660, 0x10000)
	/home/conor/thingo/go/src/github.com/llgcode/draw2d/draw2dimg/ftgc.go:63 +0xe9

Am I doing s