Conflict: crates/ui-egui/src/dialogs.rs: next's Cell Options functions and the branch's `cancel` both kept; tests: next's test module with the branch's preferences_first_setting_switches_interface_language added and its scroll-down step added to next's preferences_horizontal_scroll_reaches_clipped_options
Conflict: crates/ui-egui/src/menus.rs: Edit › Interface Language submenu removed, next's Русский entry with it