add trace support for taper tip diameter and offset override

web/kiri/lang/en.js

@@ -448,6 +448,8 @@ self.kiri.lang['en-us'] = {
     cc_sdwn_l:      ["step down depth","for each pass","in workspace units","0 to disable"],
     cc_thru_s:      "cut thru",
     cc_thru_l:      ["additional cut depth below trace bottom"],
+    cc_offd_s:      "offset",
+    cc_offd_l:      ["overrides default offset distance (which is the tool radius) when set to any value but zero"],
     cc_feed_s:      "feed rate",
     cc_feed_l:      ["max cutting speed in","workspace units / minute"],
     cc_plng_s:      "plunge rate",