WIP: Fixing text padding

[levjj]

The width of the text node does not compensate correctly for padding.

Example Code

var str = 'hmmmmmmmmmmm';
var txt = new lively.morphic.Text(lively.rect(20,10,60,50), str);
txt.openInWorld();
txt.focus();
txt.setPadding(lively.Rectangle.inset(5, 10));

Result

[rksm]

@levjj something is really wrong here: the pic below shows the padding that was set in red and the actual in blue. Could you please check and then open a new PR? Thanks!

[levjj]

I just checked with the current master and the text padding bug (as described above) is still present. The patch fixes this bug but breaks a few other things in the process, so it's still WIP (work in progress). We should not merge this yet but I would suggest to reopen the pull request or at least create a new issue for it.