fix(ui5-shellbar): set correct font-family to primary title (#228)

Author: MapTo0

packages/main/src/themes/base/ShellBar.less

@@ -87,6 +87,7 @@ ui5-shellbar {
 
 .sapWCShellBarMenuButtonTitle {
 	display: inline-block;
+	font-family: @sapUiFontFamily;
 	margin: 0;
 	font-size: 0.75rem;
 	white-space: nowrap;