Fix multiple React warnings due to invalid propTypes and bsStyle

src/browser/components/NewTeamModal.jsx

@@ -202,8 +202,8 @@ NewTeamModal.propTypes = {
   onClose: React.PropTypes.func,
   onSave: React.PropTypes.func,
   team: React.PropTypes.object,
-  editMode: React.PropTypes.boolean,
+  editMode: React.PropTypes.bool,
-  show: React.PropTypes.boolean
+  show: React.PropTypes.bool
 };
 
 module.exports = NewTeamModal;

src/browser/components/TabBar.jsx

@@ -100,7 +100,7 @@ class TabBar extends React.Component {
         id='tabBarAddNewTeam'
         onClick={this.props.onAddServer}
         style={tabButton}
-        bsStyle='tabButton'
+        className='btn-tabButton'
         title='Add new server'
       >
         {'+'}