theme: Use -gtk-icon-filter for full-color icons
authornana-4 <hnmaigo@gmail.com>
Sat, 30 May 2020 21:37:06 +0000 (06:37 +0900)
committernana-4 <hnmaigo@gmail.com>
Thu, 15 Apr 2021 09:39:08 +0000 (18:39 +0900)
commitc6483d431f1c18a371da8f7f79d049235468731e
treeac3cfd9dee1b390c1723409857475ea1e890aca6
parentd1d009b4918fc4cac6b8c72c4a580e4302a627d3
theme: Use -gtk-icon-filter for full-color icons

Not for symbolic icons.

Don't apply `-gtk-icon-filter: opacity(0.5);` to the symbolic icons as
they already have the "gray" colors indicating the disabled state.
Symbolic icons can be styled using the `color` property.

Also remove the obsolete comment.
gtk/theme/Default/_common.scss