[Console] Additional keyboard shortcuts

[ElenaStoeva]

The following keyboard commands are proposed:

From the ones above, the following are not implemented yet:

• Collapse all scopes except current
• Collapse or expand current scope
• Expand all scopes
• Open autocomplete menu
• Switch focus to autocomplete menu

[elasticmachine]

Pinging @elastic/kibana-management (Team:Kibana Management)