Add new key bindings

[Marco Ieni]

Problem

I randomly found this extension, which adds other key bindings to VSpaceCode.

It would be nice to add some of them to this extension, too.
These are the ones I would like to add here:

• workbench.action.showAboutDialog
• workbench.action.openWalkthrough
• editor.action.startFindReplaceAction
• actions.find
• notifications.clearAll
• workbench.action.quickOpenView
• workbench.action.positionPanelRight, workbench.action.positionPanelLeft, workbench.action.positionPanelBottom
• workbench.action.toggleScreencastMode

Solution

For each one, find the corresponding key binding in spacemacs and create a PR to add it.
If the key binding doesn't exist in spacemacs, find a key binding that fit well.