add info tooltip on analytics graph card

- add assets and config folders
	- rename conflicting css classess

src/components/Devices.js

@@ -94,7 +94,7 @@ const Devices = () => {
                 <Select className='day-dropdown' options={days.map(x => { return { value: x, label: x }; })} menuPlacement='auto' maxMenuHeight={250} menuShouldScrollIntoView={true} onChange={changeTestDate} />
                 <Select className='test-dropdown' options={tests.map(x => { return { value: x, label: x }; })} menuPlacement='auto' maxMenuHeight={220} menuShouldScrollIntoView={true} onChange={changeTestDate} /> */}
 
-                <button className='clear-button' onClick={toggleShowGraph}><img className="graph-icon" src={require('./graph_icon.png')} alt='icon'></img>{curTestData ? 'Clear' : 'Show'}</button>
+                <button className='clear-button' onClick={toggleShowGraph}><img className="graph-icon" src={require('../assets/graph_icon.png')} alt='icon'></img>{curTestData ? 'Clear' : 'Show'}</button>
             </div>
 
             <div className='graph-person-conatiner'>