keep cursor in filename line edit when next or previous file is selected, this is achieved by not disabling the filename line edit when no file is selected

fixed bug: extra include directories were not used by cmake build, use include directories found for configuration checks and build

MIME entries for MP3, AAC & MP4 have changed. M4A is included in MP4. Bug #2954315 by Pierre Buard.

The attached patch contains a bunch of fixes and additions to the Finnish translation.  Also included is a translation for the desktop file's GenericName key. Patch #2952292 by Ville Skyttä.

kid3 does not appear to do anything in particular when an audio/x-mpegurl playlist is passed to it as an argument, so I think that MIME type should be removed from the desktop file. Patch #2952286 by Ville Skyttä.

separate formats for "to filename" and "from filename", store history of format strings in configuration

use Unicode for ID3v2 if there are non-ascii characters (even if they would fit into latin-1), use UTF8 instead of UTF16 for ID3v2.4.0

support for cover art in Ogg files (for both the old COVERART and the new METADATA_BLOCK_PICTURE fields)

Fixed bug: Select multiple files, edit tags 2 and mark fields, then tags 2 -> tags 1 => tags 1 are not changed and tags 2 are reverted.
This bug was introduced in revision 568 by only updating the selection when a single file is selected after operations "Number Tracks", "Copy", "Paste", "From Filename", "From Tags 1/2", to avoid marking unchanged fields as changed due to transient setting of fields with a different value to an empty string.
Both problems are solved by marking fields which are different in multiple files with a special value (Frame::differentRepresentation(), actually an unequal sign) and never setting such values to the tags (Frame operations "setValueIfChanged()" instead of "setValue(); setValueChanged()"), which makes it possible to always (and not only when a single file is selected) update the selection (updateCurrentSelection()). This affects the operations mentioned above plus "Apply Tag Format", "Apply Filename Format", "Convert ID3v2.3 to ID3v2.4", "Convert ID3v2.4 to ID3v2.3".
Additionally the handling of multiple files is done separately for Tag 1 and Tag 2 to fix the following problem: Select frame without Tag 1 (e.g. m4a), then add one with Tag 1 (mp3), then select ID3 field, deselect files => ID3v1 fields are cleared.

do not update the progress bar for Qt 4, because some downloads do not work if the progress bar is updated

select directory of tagged file in Import and Export file dialogs of Edit Frame instead of directory of file list, use default file name "folder.jpg" if frame is a picture