message: [terminal_renderer] BoxDrawingRenderer: Adds U+E0BA.
diff: - Improved detection of runtime DPI changes for KDE (Plasma) desktop environment.
  - Improves Window manipulation VT sequence for saving/restoring window title (`CSI 22 ; Ps t`, `CSI 23 ; Ps t`)
  - Adds pixel-perfect box-drawing for U+EE00 .. U+EE05 for progress bar glyphs as first introduced by Fira Code (#521).
  -- Adds pixel-perfect box-drawing for U+E0B0, U+E0B2 (Triangle Powerline glyphs).
  +- Adds pixel-perfect box-drawing for U+E0B0, U+E0B2, U+E0BA (Triangle Powerline glyphs).
  - Adds preliminary implementation of `DA3` VT sequence.
  - Adds new configuration option `mouse_block_selection_modifier`.
  - Adds new configuration option `profiles.*.copy_last_mark_range_offset` (default `0`) to adjust where to start looking upwards for the `CopyPreviousMarkRange` action. This is useful for multi-line prompts.
  