general: Actions in the toolbar

Generally actions in Nautilus were accessed through context menus or keyboard shortcuts. However, those are not very discoverable and are not touch friendly.

Even more, in list view it was not possible to access background actions since there is always a selection, making Nautilus UX quite poor in that case.

Also some actions were placed in the app menu, which didn't was not as clear for some people given that we have most of actions in the toolbar.

In all, we came with a new design that solves the main goals of discoverability, touch friendly and accessibility for background actions and app actions, and now are placed in the toolbar together with an overhaul of the looks of Nautilus path bar and search.

There is still work to do, specifically finding a design that works for the selection actions and also to replace the current information floating bar. The later might be just a different goal. However this goes in the right direction.

See #322 (closed)