rref 5392. Add unread messages indicator. Open messaging window when click on header messaging icons

HTML Done

css done

for woman

another html done

messages HTML done

sample image added

file icon added

css done

rref #5392. Commit timestamp of last seen message, add api calls for unread messages, enable notifications

This reverts commit 6615b38381360f018c00b9ff608f2baa2e267be7.