Experience improvements

[slifin]

"xdebug callgraph" accessible via ctrl + p, when you select it, you get a list of current stacks at your break point inside a sublime text menu.

For variables, you could be at a breakpoint and then select "xdebug variables" via ctrl + p and get a autocomplete list of variables when you select one you would get an output panel with the value of the variable selected.

Essentially all the plugin currently displays via new panels with their own tabs etc could be replaced by autocomplete menus, then if the user is allowed to disable the use of those hacky panels. The user wouldn't be left to deal with the weird layout issues those panels can sometimes create.

The value of the variable on hover over using the new tooltip API