Picker - allow error state (#560)

* Picker - allow error state

* Enable errors in NativePicker

* Revert TextField change

Author: M-i-k-e-l

src/components/picker/NativePicker.js

@@ -95,7 +95,6 @@ class NativePicker extends BaseComponent {
       <TextField
         color={Colors.dark10}
         {...textInputProps}
-        enableErrors={false}
         value={label}
         expandable
         renderExpandable={this.renderPickerDialog}

src/components/picker/index.js

@@ -328,7 +328,6 @@ class Picker extends BaseComponent {
         color={Colors.dark10}
         {...textInputProps}
         {...this.getAccessibilityInfo()}
-        enableErrors={false}
         value={label}
         expandable
         renderExpandable={this.renderExpandableModal}