Import file into a binary node

[pleonex]

Is your feature request related to a problem? Please describe.
It is not possible to modify nodes with the content of a file.

Describe the solution you'd like
Add a context menu entry to the tree view to replace the content of the node with the data of a file. Only available if the format of the node is IBinary.

Describe alternatives you've considered
A button could make the UI unnecessary complex.