Macros from higher level displays do not propagate downwards when using PyDMEDMDDisplayButton

[phys-cgarnier]

Describe the bug

Launching a display like:
pydm -m "m1 =macro1, m2=macro2, ...." top_level_display.ui
with a PyDMEDMRelatedDisplay that launches:
bottom_level_display.edl
Does not pass the macros to bottom_level_display.edl automatically, they must be hardcoded using the the
"macros" property

Expected Behavior
Option to have the macros propagate to bottom_level_display.edl or automatically pass the macros

My Platform
Linux