Fix create new project

[NSUWAL123]

This PR solves issues #948 , #949 , #951 , #952.

1. The AOI doesn't retain once I proceed ahead from the Step 2 ( Upload Area) to other steps and revisit the Step 2 #948
   Both AOI and Uploaded Geojson now retains when proceeded to other steps of the step form.

2. UI/UX improvements for button #949
   The Click to Reset button is set to inactive if there is no AOI drawn on map and the reset icon is not visible until a geojson is uploaded.

3. The drawn AOI disappears as soon as I switch to Upload a file radio button and vice-versa #951
   When radiobutton is switched, the AOI and Uploaded Geojson will not disappear.

4. The file upload doesn't support other formats besides geojson but still accepts other formats #952
   Now only geojson's and json formats are accepted.

Additional Issues Solved:

1. CreateNewProject(Upload Area): Validation issue solved.
2. LayerSwitcher button icon UI alignment with the button.
3. CreateNewProject: FontSize adjusted, UI enhancements