Add tabbed panels support

[darilek]

Add tabbed panels support, like concurrent fork does :-)

[vectorrilke]

Nooooo, why? Your folder location history is right in the directory panel.

[0xeb]

I have to play with that fork and see what's the utility of tabs. Trust me, I have been adding all the features I find useful and in the spirit of a two panes file manager.

Let me see how useful that is.

[KRtekTM]

Nooooo, why? Your folder location history is right in the directory panel.

Location history is not the same as having the panel in tabs - in Samandarin, each tab can have separate history, set its own view type, keep the plugin panel opened, etc. In the time of multitasking, the tabs are essential feature. Tabs are the most wanted feature since 2015 or even longer.