added prevent default to plus and minus icons
added prevent default to plus and minus icons


Former-commit-id: 0b9a428de765cc8739e39cf258e2e1383d926d9f
vronvali/iLanguage,cesine/iLanguage,vronvali/iLanguage,iLanguage/iLanguage,cesine/iLanguage,iLanguage/iLanguage,vronvali/iLanguage,iLanguage/iLanguage,cesine/iLanguage,vronvali/iLanguage,iLanguage/iLanguage,vronvali/iLanguage,cesine/iLanguage,cesine/iLanguage,vronvali/iLanguage,iLanguage/iLanguage