Always show two buttons in pathbar

The pathbar is pretty useless if there is only on button for the current directory.

This is a cherry-pick of 3cf2ca8ae26ca39534d26237dd25a756060617e0
from git@github.com:daschuer/nautilus.git
fixed scrolling with two buttons
Fix some compiler warnings
configure: Fixed source control detection for git
Fixed double definition of LOCALEDIR
pathbar: do not shink buttons below minimum
pathbar: display one button if two minumum buttons do not fit
end rename when clicking bug fix
fix second bug for select all directory
ctrl+(shift+)tab now switches the current tab
Fix initialization crash
Add hidpi support
Fix nemo toolbar icons for hidpi
update an .m4 file
Fix scaling of text-x-preview (the icon used for text files in Mint-X that shows
a preview of the first few lines of text in it.)

Yay!
Update Change Desktop Background action icon
Update add desklet action icon
Change gnote to cs-desklets
Temporarily disable a thumbnail limiting
sidebar: Add Recent place.

Need to make a better icon for recent