materialdesign Top App Bar: no longer access to "hamburger menu icon"-color

[ice987987]

Describe the bug
materialdesign Top App Bar: value Titelfarbe in section Top App Bar Layout has no longer access to the "hamburger menu icon"-color (in v0.5.6) and it's color is always white. In v0.3.19 it was possible to change the "hamburger menu icon"-color together with the value Titelfarbe in section Top App Bar Layout .

Widget, View or Project Export
it is possible to change the color with following CSS-Code:

.mdc-top-app-bar .mdc-top-app-bar__navigation-icon { color: #ff0000 !important; }

Expected behavior
"hamburger menu icon"-color can be changed together with value Titelfarbe or independent.

Versions:
Adapter version: material design widgets v0.5.6
JS-Controller version: v3.2.16
Node version: v12.22.1
VIS Adapter version: v1.3.8

Additional context
see also https://forum.iobroker.net/topic/29660/material-design-widgets-top-app-bar-widget/310?_=1620912644228