issue #1580 Add last calculated cache size to Dashboard Storage chart
Size of cached files with all derivatives and representatives may be
as large as all image files, actually doubling the needed storage
size. So it may be nice to see it represented in the storage
chart, if one remembers to occasionally recalculate it under
Tools -> Maintenance..
Also make it possible to deactivate this setting.
Apparently there is no reason in make_section_in_url() to "escape" a
numeric URL for a tags section if tag_url_style is 'tag'. In
parse_section_url() tag_url_style is checked, and if 'tag' the URL token
is used.