This fixes a bug where Modeling#updateLabel would not work on
text annotations, because these need to have labels pre-configured.
* Modeling#updateLabel now takes the (optional) newBounds
* newBounds must now explicitly be passed to trigger resize
for text annotations
* newBounds is _only_ passed for text annotations via
LabelEditingProvider (it was discarded before anyway)
* lib/features/label-editing did not depend on lib/features/modeling
for historical reasons. It now uses the offical #updateLabel
API provided by Modeling
* Localize test diagrams
Closes#753
Nico Rehwaldt
Philipp Fromme