AndroidSettingsDialog: Fix kitWarning icon showing up wrongly

Change-Id: I619c858d9a379ee8b1463c048a8c34950ac25bc7
Reviewed-by: Alessandro Portale <alessandro.portale@digia.com>
AndroidSettingsDialog: Warn the user that spaces in the ndk path are bad

Task-number: QTCREATORBUG-11629
Change-Id: I576940fa5ac3fd47376cf3fc700689e1046387b0
Reviewed-by: Alessandro Portale <alessandro.portale@digia.com>