share widget: fixed crash when a text content is shared without `text` in data: sometimes, text content is shared via a path and not directly the `text` key. This is the case with vCards. This patch fixes share widget to handle this case.

<intent-filter>
    <action android:name="android.intent.action.SEND" />
    <category android:name="android.intent.category.DEFAULT" />
    <data android:mimeType="*/*" />
</intent-filter>