fix text-muted being set to default text foreground color in light mode, adjust styling of filter actions list

themes/light/defines.less

@@ -28,6 +28,8 @@
 @breakpoint-lg: 992px;
 @breakpoint-xl: 1200px;
 
+@fg-text-muted: lighten(@default-text, 20%);
+
 @embed-responsive-padding: 56.25%; // Use 56.25% for 16:9 aspect ratio, 75% for 4:3.
 
 body.ttrss_main,

themes/light/prefs.less

@@ -9,6 +9,10 @@ body.ttrss_prefs {
 		color : @default-text;
 	}
 
+	.text-muted {
+		color : @fg-text-muted;
+	}
+
 	.dijitContentPane {
 		> h1:first-of-type,
 		> h2:first-of-type,

themes/light/tt-rss.less

@@ -1348,7 +1348,7 @@ body.ttrss_main, body.ttrss_utility {
 	}
 
 	.text-muted {
-		color : @default-text;
+		color : @fg-text-muted;
 	}
 
 	.text-small, .small {