Re: [Suggestion] 'Move Post' button
Head over to your ACP (Advanced Admin Panel) and click the 'Posting' tab at the top. Select 'BBCodes' on the left hand side' and scroll to the bottom of the page where the pre-set bbcodes are. Click 'enable' next to 'left', 'right' and 'center'. Now a bbcode will show for the alignments when creating a new post in the full post editor.
As for the move post button, it isn't a bad idea, but I don't think it would be used enough to justify implementing it into the sytstem. If it is something you absolutely want, you could consider upgrading to Avanced Hosting
where you'll be able to make the appropriate file edits.