A note in why it is not a theme issue and an applet indicator one
the variable used to fix it on themes is:
GtkMenuItem::horizontal-padding
Why are you using a variable for MENU ITEMS to space ICONS? it is not called applet indicator icon padding or anything like that...
so the bug is using the value intended and designed for a different kind of visual element in screen to space or pad icons in a different context
A note in why it is not a theme issue and an applet indicator one
the variable used to fix it on themes is:
GtkMenuItem: :horizontal- padding
Why are you using a variable for MENU ITEMS to space ICONS?
it is not called applet indicator icon padding or anything like that...
so the bug is using the value intended and designed for a different kind of visual element in screen to space or pad icons in a different context