minor modal scroll fix and Lookup demo position

Author: ivansfdc

components/SLDSModal/index.jsx

@@ -85,7 +85,7 @@ module.exports = React.createClass( {
 
   updateBodyScroll () {
     if(window && document && document.body){
-      if(!this.state.isClosing){
+      if(this.props.isOpen){
         document.body.style.overflow = 'hidden';
       }
       else{
@@ -137,9 +137,13 @@ module.exports = React.createClass( {
 
   componentDidUpdate (prevProps, prevState) {
 
-    if(this.state.isClosing !== prevState.isClosing){
 
+    if(this.props.isOpen !== prevProps.isOpen){
       this.updateBodyScroll();
+    }
+
+    if(this.state.isClosing !== prevState.isClosing){
+
 
 
       if(this.state.isClosing){

demo/pages/HomePage/index.jsx

@@ -59,16 +59,15 @@ module.exports = React.createClass( {
         <main className='stage-main slds-grid slds-wrap slds-grow' role='main'>
           <div className='region region--main slds-grow slds-size--1-of-1 slds-medium-size--1-of-2 slds-large-size--8-of-12 slds-col-rule--right slds-p-around--large'>
 
-            <LookupBaseSection />
-
             <ButtonSection />
 
             <PicklistBaseSection />
 
             <ModalSection />
 
-            <DatePickerSingleSelectSection />
+            <LookupBaseSection />
 
+            <DatePickerSingleSelectSection />
 
 
 {/*