[v5] Move Tab To Start/End Keybinding

[megamorphg]

Description

I noticed a bug where if I use an extension that moves the tab to the last tab or 1st tab, if the the tab is currently in a tree, it will flatten the tree from the current tab all the way to the tab's new location.
This is disastrous when I have 400 tabs with complex tree structure.

However I do need an ability to sometimes move a single tab to the very bottom that is native to Sidebery (since extensions will conflict with the tree structure).
I use this as a way to "queue" the tab for later review. I know I can move the tab to its own panel or another window but this seems the most efficient in terms of clicks.

[mbnuqw]

Ok, I'll add these keybindings. Also, I think I can fix that behavior with flattening tree.

[megamorphg]

Ok, I'll add these keybindings. Also, I think I can fix that behavior with flattening tree.

I wonder why the tree flattens?
It's weird but actually the bug #711 is still happening for some reason. A few tree levels get flattened after a browser restart, even in windows where I never used the keyboard shortcut to move tabs or even moved those particularly nested tabs around.

[mbnuqw]

Resolved in v5.0.0