Fix exceptional resource leak (CID18460)
Fix exceptional resource leak (CID50175)
Refactor HTML tag removal
Clean up HTML encoding
Prevent a rare security exception

This should fix CID18178, and probably others
Make Configuration thread-safe and clean it
Remove duplicate IsRunningOnLinux/Mac
Add a safe method to get a registry value
Fix exceptional resource leak CID18136
Updated Turkish translation - thx Çevirmen :)
Updated Korean translation - thx domddol :)
Updated Polish translation - thx Adam :)
Updated Basque translation - thx Xabier :)
Revert "Updated Korean translation - thx domddol :)"

This reverts commit 578d16fe970894d08ef42d883ad133808056e2e1.

Blindly updating files is never good...
Revert "Updated Basque translation - thx Xabier :)"

This reverts commit faa0d2164c81dfee34bf27485934f7310bc03391.
Revert "Updated Polish translation - thx Adam :)"

This reverts commit 9aab7f5996300fe252235ce961b6a7d288e23b91.
Remove unneeded spaces from Turkish translation.

They were added for some reason in 25109238f59ae6a44b32d6025def8b46bc80a5b5.
Fix exceptional resource leak CID 18189
Move file checkers to a new file utilities class
Fix exceptional resource leak CID18207