theme-color.prop-value() was obscuring the fact that it was extracting the fallback value from custom property map (eg (varname: ..., fallback: ...)), preventing CSS variables from being created for the buffer color. The is-custom-prop if-block and existing usages of theme.property() do the equivalent of theme-color.prop-value() without any hidden magic.
refactor(linearprogress): Replace deprecated
theme-color.prop-value()theme-color.prop-value()was obscuring the fact that it was extracting the fallback value from custom property map (eg(varname: ..., fallback: ...)), preventing CSS variables from being created for the buffer color. Theis-custom-propif-block and existing usages oftheme.property()do the equivalent oftheme-color.prop-value()without any hidden magic.