This way the view corresponds to the original part properties,
not those stripped by the inline filter. Also initialize
EMailInlineFilter::filename on creation of the structure, thus
the value is actually used on the subparts, if needed.
This adds 'Format as' submenu to the preview pane context menu.
The submenu is available only for text/plain parts or parts
with a source code (we support about 40 various types). Using
the 'highlight' utility, the formatter processes the part and
highlights the source code it contains.
(discussion in bug #680026)
All mail-parsing and formatting code has been moved to em-format.
Parsing is handeled by EMailParser class, formatting by EMailFormatter.
Both classes have registry which hold extensions - simple classes
that do actual parsing and formatting. Each supported mime-type
has it's own parser and formatter extension class.
