The previous way of displaying a context menu was being
usurped by the selection tool because it was displaying its
menu before DispatchContextMenu was called, and all other tools
explictly use the TOOL_MENU system.
Fixes https://gitlab.com/kicad/code/kicad/issues/5762
- added TOOL_INTERACTIVE::resetTransitions()
- made protected and moved TOOL_BASE::setTransitions() to TOOL_INTERACTIVE
- TOOL_MANAGER calls TOOL_INTERACTIVE::resetTransitions() instead of
setTransitions()
There used to be a number of TOOL_ACTIONs that had entries both in
SetTransitions() and the event loop, which seemed redundant and
troublesome.
Now it is not necessary anymore, transitions setup is enough to execute
associated actions.