RAXAJSS-631 : Fixed the issue, where patients tab is bot highlighted when selected, in the pharmacy module.

In the Pharmcay Module the on the top, there are two tabs 
1. Patients
2. Inventory

When the page is loaded by default the "Patients" view is selected and it is highlighted. When we switch to "Inventory" , the "Inventory" tab gets selected. And again when we switch  back to "Patients" tab it is not highlighted, still the "Inventory" tab is highlited. This is fixed here.
 Below are the snapshots :

1. Snapshot showing before fixing the issue . We can see here, although the "Patients" tab is selected in the main area , it is not highlighted(backgroun goes blue) .
![patients_tab](https://f.cloud.github.com/assets/1394059/361438/eb49a98c-a1c3-11e2-9138-caf5a115e9cb.png)


2. Snapshot showing after fixing the issue. We can see here, that "Patients" tab is highlighted whenever it is selected.
![fix_pharmacy_tab](https://f.cloud.github.com/assets/1394059/361445/0b33ae78-a1c4-11e2-956d-c10b7ecc90d7.png)


Kindly review the issue fix.