Call context helper immediately by shortcut

[MaxStgs]

Is your feature request related to a problem? Please describe:
When I move cursor to place, where is dot(.) is last symbol, I want to see context helper.

Describe the solution you'd like:
Call by shortcut, for example - Ctrl + Space, as in IntelliJ.

Describe alternatives you've considered:
Auto show

Cursor in the end of line
click Ctrl + Space