Changed popup edit/save button behavior and popup appearance in detail view.

**Changed popup behavior in detail view** - If plotted marker has description or text note then only popup will appear. 

**Popup ```Edit```/```Save``` button behavior changed** :
 - Changed CSS of buttons to give feel of buttons (mouse hover, cursor etc).
 - If user puts cursor or changes text in text-area of popup then save button will appear. Previously we need to press ```tab``` or by somehow needs to get out of text area for the ```save``` button to appear.

Also removed unnecessary scripts and code to improve performance.