Unable to update address book after closing all the tabs

[gaglanicse03019]

Description :

BORG Calendar's address book does not add a new contact when the address book tab is opened immediately after closing the address book tab.
For example, if a new contact is added in newly opened address book tab, it will successfully add a new contact. But, if the address book is closed and then is re-opened, then the view does not show the newly added contact.
Note that, upon quitting the current running BORG Calendar and then reopening a new session, the address book tab shows the added contact.

Steps to reproduce :

1. Start BORG Calendar 1.8.1
2. Open the "Address Book" tab.
3. Click on "Add new" button and create a new dummy contact. Note that the contact is successfully added to the address book.
4. Close all the "Address Book" tab.
5. Reopen the "Address Book" tab.
6. Click on "Add new" button and create another dummy contact. Note that the contact is not being added to the address book.

Suggested Fix :

Show the updates made to the address book immediately regardless of address book being opened as a fresh tab or as a reopened address book tab.

Environment :

BORG - Berger-Organizer 1.8.1
Build Time: 2015-01-17 14:51:28
Java 1.8.0_31
Windows 7 x86-64
Dell Optiplex 745 (Intel Core 2 Duo E6300)

Secondary test environment:
BORG - Berger-Organizer 1.8.1
Build Time: 2015-01-17 14:51:28
Java 1.7.0_65
Ubuntu 14.04 LTS x86-64
Macbook Pro 13" (Intel Core i5-2415M)

Metadata:

Severity: Low
Reproducible: Yes (always)
Affected platforms: All