How to get the symbolic icon mechanism activated together with a custom GTK theme?
Custom GTK theme
I'm on Ubuntu 22.04 and made a custom variation of the built-in GTK 'HighContrast' theme for a visually impaired person. Its located in ~/.themes folder and I named it 'HighContrastBlack'. Using the gnome-tweaks app or dconf-editor I can successfully select and activate my custom theme. The setting is called org.gnome.desktop.interface.gtk-theme
Symbolic Icons
However I would like to have High Contrast mode from the gnome accessibility setting org.gnome.desktop.a11y.interface.high-contrast enabled as well, because this will make the gnome-shell/launcher show symbolic icons:
This is how the 'Numix-Circle' icon theme as an example looks with org.gnome.desktop.a11y.interface.high-contrast enabled and disabled:
Most apps and icon themes provide additional monochrome vector icon files in /usr/share/icons suffixed with "-symbolic". The only way to have gnome-shell use them inside the launcher seems to be by activating High Contrast mode)
Problem
But enabling org.gnome.desktop.a11y.interface.high-contrast mode forces my org.gnome.desktop.interface.gtk-theme setting to be ignored and the built-in 'HighContrast' theme to be used. This makes it impossible to use my custom 'HighContrastBlack' theme together with symbolic icons.
Question
Is there another way to trigger the use of symbolic icons in the launcher than activating org.gnome.desktop.a11y.interface.high-contrast?
PS: I also tried the 'HighContrast' icon theme, which has a similar look than the symbolic icons. But it only covers some apps – the others will stay full-colored.
