Desktop app: replace context-menu by dropdowns

[255kb]

Problem

Some features and options are inside right click context menus, in the environments, routes, data buckets or callbacks menus.
This is not ideal for accessibility and feature discoverability.

Solution

Replace by regular dropdowns:

Optional: keep the right click to display this dropdown at the mouse cursor position. But this seems to be a pain to implement with ng-bootstrap and popper.js options.