master.mint22

• dual-pane: add vertical split, separate sidebars, nav bars, and statusbars
• pre-view pane: Adds a Preview Pane to Nemo that shows a live preview of files in a right-hand panel.
• These features mirror the dual-pane/preview-pane workflow of xplorer² on windows.
• fix: Set undo/redo label for multi-item trash operations