This also adjusts the logic internally to lookup the priority by the
priority_urgency field, which should be constrained to follow priority
precedence over the priority_id field.

If failing to import file content data, drop contents imported thus far

This patch adds an export+import method to the file command line module. The
file export is agnostic of the file storage backend. It writes the files
with the %file record data to standard-out or to the file given by the -f
option. The file is a considered a stream and can quietly be compressed and
can be read back in as a stream (no seeking is performed in the import
process).

This patch also makes a slight edit to mPDF to allow better detection of
substitions in characters, as the DejaVu fonts shipped do not support Thai
glyphs.

If there is a problem installing some of the items with the system, try not
to crash simply because the error is passed into another ::create()
function.

And allow for @context to add context to the bare string literal. For
instance,

    /* @trans, @context "noun" */ 'Open'

Would mark the string 'Open' translatable with context "noun".

Make table prefix consistent

Implement the logic to set status

Help topics and filters can override the default status

DynamicList initial data