Added additional hot-key options for scanner

- Initiate VRBoost Memory Scan: NUMPAD5    or   <LCTRL> + </>
- Increase Candidate Selection: NUMPAD6 or <LCTRL> + <.>
- Decrease Candidate Selection: NUMPAD4 or <LCTRL> + <,>
- Cancel VRBoost Memory Scan Mode: NUMPAD8 or <LCTRL> + <;>
Merge branch 'master' of https://github.com/cybereality/Perception