C2A full changelog

An option has been added to remove unfiltered asteroids and comets in the list.
The current orbital element file is now taken into account in the default configuration.
The argument mapType on the commande line can take the values altAz, equatorial, zenithN, zenithE, zenithS and zenithW.
A bug has been fixed when copying the current map in the Windows clipboard.
A bug has been fixed when loading a C2A configuration (a .bil file was renamed while it was not existing).
A problem has been fixed when loading very large orbital element files such as the MPCORB.DAT file from MPC that now contains more than 1,380,000 objects.

Few minor bug fixes.
It is now possible to import comet orbital elements where perihelion distance is greater than or equal to 10 AU.

New features:
Orbital elements from JPL are now taken into account in the automatic importation process.
Since January 1st, 2021, Mars, Jupiter, Saturn and Uranus satellites are not displayed anymore in previous versions of C2A (IMCCE polynomial coefficient files have not been updated). This is partially solved in this version where Jupiter and Saturn satellites are displayed if the Pyhton environment is installed on your computer. For now, Mars and Uranus satellites are not displayed.
It is now possible to change the constellation names by editing the files constellations_fr.txt (for French version) and constellations_en.txt (for English version). These files are located into the C2A installation folder.
3000 orbital elements can now be displayed in the Asteroid and Comet tool.
The Moon terminator (display, phase tool, planet visibility tool and main window icon) is reverted if the current location is in the South hemisphere.

Change of behaviour of the Julian Day display zone in the main window: a left click on this zone triggers the display of a dialog box to enter a UT date expressed in Julian days that will become the current date of the map. A right click on this zone copies the current Julian day into the Windows clipboard.
A bug has been fixed regarding the background image management system.
A bug has been fixed in the interface to enter geographical coordinates under the for of a decimal number. E, W, S, N symbols were not correctly interpreted.
Planetary magnitude accuracy has been improved.
A bug has been fixed in tne calculation of comet magnitudes (there was an issue with the very specific comet 1I/`Oumuamua).

This version includes the concept of "default configuration" that allows the user to quickly roll back to a pre-defined configuration. It also fixes several minor bugs.

First integration of the Gaia Grappa2 catalogue. This integration is still experimental et is intended only for selected users.
URL format has been changed to automatically access orbital elements from the Minor Planet Center web site (the secured version of the HTTP protocol is now used).
The equatorial coordinates of the asteroids and comets are now updated in the control panel in case the date and time of the current map are changed.
An issue is fixed when close user objects are identified in the map.