Enhancement field - keyword search string

[vladiscripts]

Please, add in the plugin template next:

1. String #66. Replace '<input type="text"' to '<input type="search"'. For enhances of browser Google Chrome, it add icon the delete cross in the field.
2. Also ibid ' webkit-speech="x-webkit-speech" speech="" ' for enhances of this browser, it add icon the microphone in the field for speech search.
3. Also ibid ' placeholder="" ' with new parametr of plugin for placeholder the field.
4. Should option for remove/change 'label' for the field, as has dropdown fields.