Fix font-weight of settings button

Signed-off-by: Morris Jobke <hey@morrisjobke.de>

core/css/apps.scss

@@ -477,7 +477,7 @@ kbd {
 	border-radius: 0;
 	text-align: left;
 	padding-left: 42px;
-	font-weight: 300;
+	font-weight: 400;
 	&:hover,
 	&:focus {
 		background-color: $color-main-background;