Update GCode Preview to v2.0.6

Fixes an issue with the model sometime not being visible or centered correctly

Author: remcoder

octoprint_gcodethumbs/__init__.py

@@ -11,7 +11,7 @@ def on_after_startup(self):
 
     def get_assets(self):
         return dict(
-            js=["js/gcode-parser.js", "js/gcode-preview.js", "js/gcode-preview-viewmodel.js"]
+            js=["js/gcode-preview.js", "js/gcode-preview-viewmodel.js"]
         )
 
 __plugin_implementation__ = GCodeThumbsPlugin()

octoprint_gcodethumbs/static/js/gcode-parser.js

@@ -72,7 +72,7 @@ $(function() {
         const canvas = document.createElement('canvas');
 
         // instantiate preview
-        const preview = new GCodePreview({
+        const preview = new GCodePreview.Preview({
           canvas : canvas,
         });