You'd think this would never happen, but it can if a page is defined as PUBLIC and has the sideblock on it.

Throw SystemExceptions rather than Exceptions when files can't be found to be included in safe_require.

When uploading files with only digits in the extension, append more digits on clash rather than trying to preserve the extension

Conflicts:

	htdocs/artefact/blog/theme/default/render/blogpost_renderfull.tpl

Workaround for having to click folder names twice to change folder after removing items from select list