CallerCallee add jump to source location in disassembly

[lievenhey]

this patch adds a context menu that allows the user to select if he wants to open the source code or opens the disassembly and focus the selected location

closes: #515

[lievenhey]

@GitMensch I added some prototype jumping the the disassembler. You can ether press F6 (all good shortcuts were already in use) to open a goto menu or use the context menu to jump to a specific line (source code only currently).
I know it is a bit clunky but I am trying to figure out what is the best way to add some navigation.

I would like to hear which method work best. (Yes the context menu is hard to use currently / broken, I will fix that later as well as adding it to the assembly side)

[GitMensch]

Thank you for working on this.

I did check the location pane in caller/callee tab and do see both context menu entries - but

• in one case (sourcefile deleted) there is no context menu at all, no message, no output in stderr/logging
• in all others the Disassembly entry did not do anything (also no output in stderr/logging), while "open in file" does work and positions to the right place and Disassembly on the function level (all other panes and views) works fine

Checking F6 yields in the "go to line" being shown, placing "115" in there and pressing Enter does not seem to work either.

Note: all of CTRL+F (in both panes) and F6 (only on the source) has a remarkable time (1-2 seconds) to be shown ?!?

In any case: CTRL+G is already taken, what about ALT+G or CTRL+SHIFT+G?

[lievenhey]

I added it also for the disassembly, but it doesn't work there (currently)