Fixed the orientation issue with rendering sketch as svg.

The sketches were flipped vertically when displayed as svg. It was due to the
defaults in the drawSvg library that was using bottom-left corner as the
origin by default. Fixed it by specifying the top-right as the origin.

community/lms/doctype/lms_sketch/livecode.py

@@ -37,7 +37,7 @@ def _read_messages(ws):
     return messages
 
 def draw_image(commands):
-    img = draw.Drawing(300, 300, fill='none', stroke='black')
+    img = draw.Drawing(300, 300, origin=(0, -300), fill='none', stroke='black')
     for c in commands:
         if c['function'] == 'circle':
             img.append(draw.Circle(cx=c['x'], cy=c['y'], r=c['d']/2))