Enabled "onlyClasses" option for MonthArrowPrev and MonthArrowNext

Author: Adam Weber

src/Calendar.js

@@ -101,7 +101,7 @@ class Calendar extends Component {
           style={onlyClasses ? undefined : { ...styles['MonthButton'], float : 'left' }}
           className={classes.prevButton}
           onClick={this.changeMonth.bind(this, -1)}>
-          <i style={{ ...styles['MonthArrow'], ...styles['MonthArrowPrev'] }}></i>
+          <i style={onlyClasses ? undefined : { ...styles['MonthArrow'], ...styles['MonthArrowPrev'] }}></i>
         </button>
         <span>
           <span className={classes.month}>{month}</span>
@@ -112,7 +112,7 @@ class Calendar extends Component {
           style={onlyClasses ? undefined : { ...styles['MonthButton'], float : 'right' }}
           className={classes.nextButton}
           onClick={this.changeMonth.bind(this, +1)}>
-          <i style={{ ...styles['MonthArrow'], ...styles['MonthArrowNext'] }}></i>
+          <i style={onlyClasses ? undefined : { ...styles['MonthArrow'], ...styles['MonthArrowNext'] }}></i>
         </button>
       </div>
     )