GP: New automatic adaptative UVs parameter

Now by default the UVs are calculated with a fixed size and this makes easier to add patterns for drawings like Manga. Before, the texture changed depending of the stroke size.

release/scripts/startup/bl_ui/properties_data_gpencil.py

@@ -345,6 +345,7 @@ class DATA_PT_gpencil_display(DataButtonsPanel, Panel):
             layout.prop(gpd, "show_stroke_direction", text="Show Stroke Directions")
 
         layout.prop(gpd, "use_force_fill_recalc", text="Force Fill Update")
+        layout.prop(gpd, "use_adaptative_uv", text="Adaptative UVs")
         layout.prop(gpd, "zdepth_offset", text="Surface Offset")