fix drill visuals and default fill color

Author: Russell-Shean

src/powerbpy/page.py

@@ -819,7 +819,7 @@ def add_shape(self,
                  shape_rotation_angle=0,
                  #background_color="#FFFFFF",
                  # background_color_alpha=None,
-                 fill_color="#FFFFFF",
+                 fill_color="#4A90E2",
                  fill_color_alpha=None,
                  tab_order = -1001,
                  z_position = 6000,

src/powerbpy/visual.py

@@ -147,8 +147,9 @@ def __init__(self,
                 }
 
             ]
-                    }                                          },
+                    } ,
                 "drillFilterOtherVisuals": True
+                 }
 
                 }