DFG-Viewer Integration: Canvas height does not consider height of container

[markusweigelt]

Canvas height should be based on the height of the container. Currently, there are unnecessary scrollbars here, even though there is enough space to display the model.

Additionally, the fullscreen and download buttons are not visible.

[thedworak]

Now it's based on the container dimensions, will be updated in next release

[markusweigelt]

Currently, the scrollbars are still displayed, and you have to scroll to access the buttons for download and fullscreen.

Tested against the current master branch.

Is there a way to provide a stable version without a release, for example, via a stable branch? Releases could then be generated from this branch. Otherwise, too much time passes between fixing issues and making them available.