A tool window for sketch Offset, with a typed Distance, Flip and Chain (#731)

Sketch Offset gets its own tool window with a typed Distance, Flip and Chain, as a variant of the sketch modify window.

crates/ui-egui/src/locales/en.json

@@ -46,6 +46,7 @@
   "ui.cancel": "Cancel",
   "ui.canvases": "Canvases",
   "ui.centerline": "Centerline",
+  "ui.chain": "Chain",
   "ui.chamfer": "Chamfer",
   "ui.change_workspace": "Change workspace",
   "ui.chord_length": "Chord Length",
@@ -74,6 +75,7 @@
   "ui.create_sketch": "Create Sketch",
   "ui.current": "current",
   "ui.curvature": "Curvature",
+  "ui.curves": "Curves",
   "ui.cut": "Cut",
   "ui.cylinder": "Cylinder",
   "ui.dark": "Dark",
@@ -143,6 +145,7 @@
   "ui.heading_mirror": "MIRROR",
   "ui.heading_modify": "MODIFY",
   "ui.heading_move": "MOVE",
+  "ui.heading_offset": "OFFSET",
   "ui.heading_offset_plane": "OFFSET PLANE",
   "ui.heading_ok": "OK",
   "ui.heading_parameters": "PARAMETERS",