Extension in nemo for better navigation

[kdmenk]

I had the idea to extend nemo for better navigation. I think always toggling between Treeview and Places is not very usefule.
So I decided to check if I could extend the functionality. I made already some progress (even found and fixed a bug in the existing code base).
The new side pane appears when pressing the small button (left button) between the two existing buttons.
Just want to know, what you think about this idea and feature extension. (It is closer to the MS Explorer behavior)
By the way, the existing views and functionality is not changed.

Interesting to here from you, if such a handling (closer to MS Explorer) is helpful for you.
I will need more time to furnish this project, because integration all nemo features in a new side pane takes some effort.

I committed a first stable draft implementation in https://github.com/kdmenk/nemo-places-treeview/tree/sidebar-treeview
You can compile this version and just check and see how it works and if it is usable for you.
But there are still features to implement like for example (key handling, drag & drop...). It will take some time to make it completely integrated.

Key Improvements in last version:
(Behavior is now consistent with Windows Explorer.)

• Arrow Key Navigation:

• Up/Down: Navigate through the deepest expanded level of the Tree View.
• Left: Move one level up; a second press collapses the selected node.
• Right:` Expand the selected row if subdirectories exist.

• Automatic Updates:

• The Tree View now updates automatically when the underlying filesystem changes. This feature is currently supported for local filesystems. For other filesystems, polling support will be added in future releases.

- Lazy Loading:
Directories load in the background, displaying a "Loading..." indicator to ensure the Nemo GUI remains responsive.

- Drag & Drop:

• Drag & Drop to the Tree View is fully functional.
• Drag & Drop from the Tree View is planned for a future update.