ft: mute_active overhaul

no longer toggles grey shader, just makes the border grey
+ fixed mute_active dunst notif
+ keybinds

scripts/hypr-windowShaders/muted.glsl

@@ -1,9 +0,0 @@
-// Values obtained from: http://en.wikipedia.org/wiki/Grayscale#Luma_coding_in_video_systems
-vec3 LumaFactors = vec3(0.299, 0.587, 0.114);
-
-void windowShader(inout vec4 color) {
-  // Desaturate to luma only
-  float luma = dot(vec3(color.r, color.g, color.b), LumaFactors);
-
-  color.rgb = vec3(luma, luma, luma);
-}