fix(input): clear text input

* Added Type Button

To prevent the clear button to call submit function if ngSubmit is used.

* Clear Input Action.

Added a change value action to the clearTextInput function. It now actually clears input

ionic/components/input/input-base.ts

@@ -406,6 +406,7 @@ export class InputBase {
    */
   clearTextInput() {
     console.debug('Should clear input');
+    this._value = '';
   }
 
   /**