points property sets _mode to LINE_MODE_POINTS 
points property sets _mode to LINE_MODE_POINTS 

To be consistent with ellipse, circle, rectangle, rounded_rectangle, and bezier properties, the points property should change `_mode` to LINE_MODE_POINTS.
kivy/kivy,akshayaurora/kivy,matham/kivy,matham/kivy,matham/kivy,kivy/kivy,akshayaurora/kivy,rnixx/kivy,inclement/kivy,kivy/kivy,rnixx/kivy,matham/kivy,akshayaurora/kivy,rnixx/kivy,inclement/kivy,inclement/kivy