Extend filters to allow html attributes to be passed down

[oakley808]

Hello.
Currently it appears there is no way to add an html attribute to the underlying markup that is generated by the built-in filters such as <SelectFilter>.

My use-case would be adding an id, data, or aria attribute to the html elements such as a <select>.

Attributes are passed to the component in the JSX.

react-bootstrap-table/src/TableHeaderColumn.js

Line 70 in 281db99

<SelectFilter ref='selectFilter' { ...this.props.filter }

But they aren't shared with the HTML elements.

react-bootstrap-table/src/filters/Select.js

Lines 98 to 104 in 281db99

	<select ref='selectInput'
	style={ this.props.style }
	className={ selectClass }
	onChange={ this.filter }
	defaultValue={ (this.props.defaultValue !== undefined) ? this.props.defaultValue : '' } >
	{ this.getOptions() }
	</select>

I'm happy to submit a PR if you agree with the use.

[AllenFang]

@oakley808 got it, I can handle this on next version :) But if you wanna have some contribution, please let me know. Thanks