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/de.json

@@ -46,6 +46,7 @@
   "ui.cancel": "Abbrechen",
   "ui.canvases": "Kanvas",
   "ui.centerline": "Mittellinie",
+  "ui.chain": "Kette",
   "ui.chamfer": "Abschrägung",
   "ui.change_workspace": "Arbeitsbereich wechseln",
   "ui.chord_length": "Sehnenlänge",
@@ -74,6 +75,7 @@
   "ui.create_sketch": "Skizze erstellen",
   "ui.current": "aktuell",
   "ui.curvature": "Krümmung",
+  "ui.curves": "Kurven",
   "ui.cut": "Ausschneiden",
   "ui.cylinder": "Zylinder",
   "ui.dark": "Dunkel",
@@ -143,6 +145,7 @@
   "ui.heading_mirror": "SPIEGELN",
   "ui.heading_modify": "ÄNDERN",
   "ui.heading_move": "VERSCHIEBEN",
+  "ui.heading_offset": "ABSTAND",
   "ui.heading_offset_plane": "ABSTANDSEBENE",
   "ui.heading_ok": "OK",
   "ui.heading_parameters": "PARAMETER",