Dialog wrap title instead of taking same space as the close/cancel button

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

src/components/views/dialogs/BaseDialog.js

@@ -144,6 +144,7 @@ export default createReactClass({
                 >
                     <div className={classNames('mx_Dialog_header', {
                         'mx_Dialog_headerWithButton': !!this.props.headerButton,
+                        'mx_Dialog_headerWithCancel': !!cancelButton,
                     })}>
                         <div className={classNames('mx_Dialog_title', this.props.titleClass)} id='mx_BaseDialog_title'>
                             {headerImage}