Updates to viewport

I’m currently too tired of working on the timeline again, so I moved to some simple tasks (two of them were not that simple).

Added cap styles to paths
When drawing a path and pressing Enter/Return, the path is completed, and you end up with a curved line :D
Choosing the bezier draw tool now deselects any paths (that was annoying, to me at least)
You could now select and deselect shapes using node tool without switching to the selection tool (only difference is that you cannot rotate or scale, but you can edit individual nodes and handles)