Toolbar width no longer limited to editable content width

[constfun]

When editing content that is in a narrow column the toolbar is wrapped to the same width as the content. This default is impossible to change without hacking up hallo since the width is set to the "style" attribute of hallotoolbar.

Solution: Keep it minimal by not messing with the width of the toolbar. =)

[bergie]

@pacemkr it seems your patch makes some of our tests fail. Can you look at that?