ENYO-831: HermesFileTree: show error popup instead of crashing
ENYO-831: HermesFileTree: show error popup instead of crashing

- throw-ing exception from async lambda function is useless.

Enyo-DCO-1.1-Signed-off-by: Francois-Xavier KOWALSKI <francois-xavier.kowalski@hp.com>

enyojs/ares-project,mcanthony/ares-project,mcanthony/ares-project,mcanthony/ares-project,enyojs/ares-project,enyojs/ares-project,mcanthony/ares-project,mcanthony/ares-project,mcanthony/ares-project,enyojs/ares-project,enyojs/ares-project