nmTunnelAppIcon function
App mark by a simple name (telegram, youtube, x …), if bundled. Was nmAppIcon in nativemind_widgets 0.5:
renamed because Gleb Sosnin's tab icon nmAppIcon (handmade) takes the name.
Implementation
NmIconData? nmTunnelAppIcon(String name) => NmVpnSvgIcons.byName['apps/${name.toLowerCase()}'];