Allow id's to be used in tables in Admin CP
Fixes #1860 Wrong message displayed whilst editing user from mod cp
Adds "Can view board when closed" option for usergroups

Completes suggestion from this thread:
http://community.mybb.com/thread-150737-post-1060550.html#pid1060550
change "$bottom_label" type

$bottom_label is "string", it isn't "array"!
Fixes #2280 Hitting Post Thread when having disallowed attachment ignores all submitted content
Fixes #2292 Problem with Find Attachments result in ACP
Fixes #2261 Showing the results of a poll uses theme from post with pid equal to poll's id
Fixes #2278 "You did not enter a description for this scheduled task"
Fixes #2207 Wrong Post Dates and guest names in Moderation Queue
Fixes #2264 delete user - thread uid
Fixes #2258 Unused template
Fixes #233 Admin Log errors
Remove horizontal rule/paste text buttons
Improve link color for red alerts

The light blue on pink was quite harsh on the eyes.
Remove custom color for board closed notice
Improve dismiss PM notice
Remove unneeded <br> tags
Fixes #187 "Update Attachment" button shows regardless of attachments
Update postbit_attachments language string
Remove pms_in_folder language variable

When viewing a PM folder, you're greeted with the message "Private Messages in folder Inbox". It's no harder to understand what folder you're in if you're displayed with the folder name alone.