MInor cosmetic improvements to the line chart

/*

 * Copyright (c) 2019

 * InterDigital Communications, Inc.

 * All rights reserved.

 * Copyright (c) 2019  InterDigital Communications, Inc

 *

 * The information provided herein is the proprietary and confidential

 * information of InterDigital Communications, Inc.

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

import _ from 'lodash';

import * as d3 from 'd3';

import React from 'react';

import {Axis, axisPropsFromTickScale, LEFT, BOTTOM, TOP} from 'react-d3-axis';

import {Axis, axisPropsFromTickScale, LEFT, BOTTOM} from 'react-d3-axis';

import { LATENCY_METRICS, THROUGHPUT_METRICS } from '../meep-constants';

import { blue } from './graph-utils';

// const Axis = props => {

//   const axisRef = axis => {

//     axis && props.axisCreator(select(axis));

        d={mobilityEventLine(me)}

        id={me.timestamp}

        key={me.timestamp}

        style={{stroke: 'gray', strokeWidth: 1, fill: 'none', textAnchor: 'middle'}}

        style={{stroke: blue, strokeWidth: 2, fill: 'none', textAnchor: 'middle'}}

      />

    );

  });

      </g>

      <g

        transform={`translate(${margin.left}, ${height - margin.top})`}

        transform={`translate(${margin.left}, ${height - margin.top - 5})`}

      >

        <Axis

          {...axisPropsFromTickScale(x, 10)}

      <text

        className='chartTitle'

        y={0 + margin.top -5 }

        y={0 + margin.top - 8 }

        x={width / 2}

        style={{textAnchor: 'middle'}}

      >