Introduce a ShrinkCurrentWidePopupComboBox and ComboSizing to make combobox controls shrink to the current selection while the popup widens to fit the longest item. Add factory helpers (make_colormap_combo, make_bbox_color_combo) that create/populate colormap and bbox-color combos with sizing, icons, tooltips and safer Matplotlib handling. Rename/refactor colormap helpers (list_colormap_names, _safe_mpl_colormaps_registry), improve gradient icon creation, and preserve editable behavior if Matplotlib is unavailable. Update main_window to use the new factories, pass sizing and icon options, and adjust key widths for layout consistency.

Add graceful SIGINT handling for the Qt app by installing a signal handler that closes the main window and starting a small QTimer keepalive so Python can process signals while the event loop runs. The timer is stored on QApplication as _sig_timer and cleaned up on aboutToQuit. In the GUI, replace plain QComboBox instances with color_ui.ShrinkCurrentWidePopupComboBox for processor and camera controls, and layout them together using lyts.make_two_field_row to produce a compact, stable row and avoid shifting.

Import the logging module and emit an informational log when a keyboard interrupt triggers _request_quit inside _maybe_allow_keyboard_interrupt. This adds visibility for debugging application shutdowns without changing existing close behavior.

Replace the previous side-panel layout with a QDockWidget-based controls panel to allow docking/undocking and prevent UI shifting. Extract stats layout into _build_stats_layout and enable selectable stats text. Add sizing/shrink options and placeholder for processor and camera combo boxes and call update_shrink_width at key points so combo widths adapt. Add controls toggle to the View menu, set dock features/options, and give the dock a stable objectName for state saving. Also stop the display timer on shutdown and perform minor UI/layout cleanups and refactors (imports and button/preview layout adjustments).

Allow the left controls dock to be closed independently by adding QDockWidget.DockWidgetClosable to its features. Hide the docked title bar by applying a transparent stylesheet to the controls dock to improve visual integration. Also add a separator in the View menu before the Appearance submenu

Prevent the Controls dock from being closed by the user (keep it movable/floatable) and replace the previous toggleViewAction with an explicit, checkable "Show controls" QAction in the View menu. The new action is synchronized with the dock's visibility (action toggled -> dock visibility; dock visibilityChanged -> action checked). Also minor reordering/cleanup of Appearance menu setup and comments.