fix(forms): Changed the TextValueAccessor to apply ng-touched on blur

See NativeScript#1230

Author: hgmich

Diff for: nativescript-angular/forms/value-accessors/text-value-accessor.ts

@@ -38,7 +38,7 @@ export type TextView = {text: string} & View;
         "search-bar[ngModel], search-bar[formControlName],search-bar[formControl]",
     providers: [TEXT_VALUE_ACCESSOR],
     host: {
-        "(touch)": "onTouched()",
+        "(blur)": "onTouched()",
         "(textChange)": "onChange($event.value)",
     },
 })