When the {nav Crop} tool is started in standard mode and then enabling
`Advanced settings` the window width is not updated, which can result
in a cut off toolbar.
This is caused by the design of the image tools which are not embedded
by a layout to the image view and therefore not automatically
exchanging layout/resize events.
To solve this `SlideContainer::eventFilter()` now handles
`LayoutRequest` events of the content widgets.
Updating the geometry for these events makes some layout problems in
`SaveBar` visible which is also derived from `SlideContainer`.
The link label is adjusted to be still shrinkable and don't force the
SaveBar getting too wide.
FIXED-IN: 18.08.1