Update .gitignore to ignore phpStorm.
Code clean-up.
Remove create_function, use __return_null callback instead.
Remove unnecessary closing tag.
Remove invalid span tag around an h2.
Remove unnecessary closing span tags.
Move "Please Note!" to below  h2 to fix flicker.

WP javascript moves any .error to below the first h2.
Beautify Plugins admin page block/unblock messages.