Minor typos in the webclient

1- Occurrences is misspelled in the header of the dialog box to constrain panel item by number of occurrences (see screenshot)

2- The tooltips in the panel constraint options are confusing. Suggest they match the header of the dialog box that pops up

3- In the session timeout box, it says "Your session will automatically time out in 5 minutes due to inactivity. Please click "OK" to continue your session, or click cancel to log out." But there is no 'Cancel' button. The button is labelled 'Log out' Text should be changed to match button.

4- The dropdown menu for the temporal constraint should be taller and narrower. The width should match the width of the options when a user clicks on the dropdown.