Numerous whitespace fixes in patches to SMF code

The tapatalk code itself seems to follow a style convention of using
four-spaced indents, which I've left alone. However, some of the
patches to SMF's own code weren't following SMF's convention of tabbed
indents. This patch remedies those, in addition to inserting a missing
newline in Sources/ModerationCenter.php.
Merge pull request #18 from theflatearthsociety/whitespace-fixes

Numerous whitespace fixes in patches to SMF code