Started the work on Sidebar
Merge master into wip/ui-rewrite
Merge remote-tracking branch 'origin/wip/ui-rewrite' into wip/looks-familiar

Conflicts:
	src/CMakeLists.txt
	src/gtk/GtkFileTreeView.cpp
	src/gtk/GtkGraph.cpp
	src/gtk/GtkGraph.hpp
	src/gtk/GtkMainWindow.cpp
	src/gtk/GtkMainWindow.hpp
	src/gtk/GtkTorrentTreeView.cpp
	src/gtk/GtkTorrentTreeView.hpp
builds