CSS fixes to themes, removed redundant CSS

Issue
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CSS cleanup, tizen popup style was missing, popup footer clear:both missing

Test Case
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Inspect css for themes

Fix
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- af.popup.js added a div with clear:both for footer, so that background color can be added
- added popup css style for tizen.css
- cleaned up css and removed redundant css
- index.html - changed order of css to match af.ui.css