Steps for reproduce:
1. Create a tag with title case, e.g. "My Tag 1".
2. Observe the case of the tag created in step 1 in Available tag list, it would be "my tag 1".
A tagname eBooks, would be stored as ebooks which would not be read by end user as intended.
While storing any new tag,
- Check in database if the same tag name exist by ignoring case.
- If exist, ignore storing new tag or else add this new tag preserving case.