Change Instasearch View Key Bind

[zaerald]

On Issue #85 there seems to have a problem with the key binding because the key binding has an M4 binding which only Mac OSX has binding on the CTRL.
This PR changed the key binding to support other platforms

From the eclipse documentation:

M1 is the COMMAND key on MacOSX and the CTRL key on most other platforms
...
M4 is the CTRL key on MacOS X, and is undefined on other platforms

but changing only the M4 to M1 creates a conflict between the other key binding, so I added a new modifier M2.

After this PR is merged all platforms can now open the Instasearch view with the following key binding:

• Mac: ⌘ + ⌥ + ⇧ + I
• Other Platforms: ⌃ + Alt + ⇧ + I