Fix header menu & contact popover

Signed-off-by: John Molakvoæ (skjnldsv) <skjnldsv@protonmail.com>

core/css/apps.scss

@@ -876,6 +876,10 @@ $popovericon-size: 16px;
 		display: block;
 	}
 
+	.contactsmenu-popover {
+		margin: 0;
+	}
+
 	ul {
 		/* Overwrite #app-navigation > ul ul */
 		display: flex !important;

core/css/header.scss

@@ -70,7 +70,8 @@
 
 #header {
 	/* Header menu */
-	.menu {
+	.header-left > nav > .menu, 
+	.header-right > div > .menu {
 		background-color: var(--color-main-background);
 		filter: drop-shadow(0 1px 5px var(--color-box-shadow));
 		border-radius: 0 0 3px 3px;