[ Improvement ] Closing Expo via exit button / icon and "Expo Peek"

[duracell80]

Using expo is very productive for switching workspaces. Say though you're just peeking into each workspace via expo the only real way to exit expo at the moment back to the workspace you were in is to press ESC. The only way to do it with the mouse / touchpad is to select a workspace.

1) Would be very handy to offer a close expo icon by default with the option to hide it for those that don't want to close expo via mouse.

2) True peeking with expo. Kinda like a hot corner, hovering over the expo icon in the panel "peeks" in this way into the workspaces when toggled on in the applet settings. Keeping the panel open and escaping out of expo when coming back into another part of the panel with the cursor. That would be another excellent improvement, in that way peeking into expo keeps the panel ontop of expo (and disables auto hide maybe).