Add 2023 field to Spline UI

Copied the 2023 field image to Spline UI.

Signed-off-by: Ravago Jones <ravagojones@gmail.com>
Change-Id: I6553c88064f150a0f855b13a43750370375fa7f0
diff --git a/frc971/control_loops/python/path_edit.py b/frc971/control_loops/python/path_edit.py
index 2b55e94..86777e5 100755
--- a/frc971/control_loops/python/path_edit.py
+++ b/frc971/control_loops/python/path_edit.py
@@ -81,9 +81,13 @@
     def set_field(self, field):
         self.field = field
         try:
-            self.field_png = cairo.ImageSurface.create_from_png(
-                "frc971/control_loops/python/field_images/" +
-                self.field.field_id + ".png")
+            if self.field.field_id.startswith('//'):
+                self.field_png = cairo.ImageSurface.create_from_png(
+                    self.field.field_id[2:])
+            else:
+                self.field_png = cairo.ImageSurface.create_from_png(
+                    "frc971/control_loops/python/field_images/" +
+                    self.field.field_id + ".png")
         except cairo.Error:
             self.field_png = None