[cdt-dev] Add Expression Groups - Luna

[Alena Laskavaia <elaskavaia.cdt@xxxxxxxxx>]

I found out recently that gdb dsf now support some
powerful _expression_ groups which allow to mitigate absence of "add global" in Variables view.
I also found out that this feature totally not discoverable except if you read docs or "whats new".
So I proposed to add menus to _expression_ view to add locals and registers groups.
Finally I implemented this, but to put this in 8.6 I need committers approval since it is
past UI freeze.
Technically it is not much of UI feature but discovery of feature feature...

https://git.eclipse.org/r/#/c/39905/

Anyway if somebody opposes say -1...otherwise I assume you abstain.

Also while we at it if you know any other way of how we can explain/guide user to understand this feature we are open to suggestions.