Multiple UI Improvements

- Changing the UI for the active item in the nav
- Updating the UI for drag and drop
- Fixing z-index for date selector

web/react/components/file_upload_overlay.jsx

@@ -12,19 +12,21 @@ export default class FileUploadOverlay extends React.Component {
 
         return (
             <div className={overlayClass}>
-                <div className='overlay__circle'>
-                    <img
-                        className='overlay__files'
-                        src='/static/images/filesOverlay.png'
-                        alt='Files'
-                    />
-                    <span><i className='fa fa-upload'></i>{'Drop a file to upload it.'}</span>
-                    <img
-                        className='overlay__logo'
-                        src='/static/images/logoWhite.png'
-                        width='100'
-                        alt='Logo'
-                    />
+                <div className='overlay__indent'>
+                    <div className='overlay__circle'>
+                        <img
+                            className='overlay__files'
+                            src='/static/images/filesOverlay.png'
+                            alt='Files'
+                        />
+                        <span><i className='fa fa-upload'></i>{'Drop a file to upload it.'}</span>
+                        <img
+                            className='overlay__logo'
+                            src='/static/images/logoWhite.png'
+                            width='100'
+                            alt='Logo'
+                        />
+                    </div>
                 </div>
             </div>
         );