One tool window for sketch Fillet and the three sketch Chamfers (#789)

Sketch Fillet and the three sketch Chamfers share one tool window, with its own icons, labels and a scenario.

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

@@ -307,6 +307,7 @@
   "ui.centerline": "Centerline",
   "ui.chain": "Chain",
   "ui.chamfer": "Chamfer",
+  "ui.chamfer_type": "Chamfer Type",
   "ui.change_workspace": "Change workspace",
   "ui.chord_length": "Chord Length",
   "ui.circle": "Circle",
@@ -331,6 +332,8 @@
   "ui.construction": "Construction",
   "ui.context_menu": "Context menu",
   "ui.copy": "Copy",
+  "ui.corner": "Corner",
+  "ui.corners": "Corners",
   "ui.counterbore": "Counterbore",
   "ui.countersink": "Countersink",
   "ui.create": "Create",