Display the filetypes in the Open dialog filetype combo box grouped,
as they are in the filetypes menu.
This makes it easier to select a filetype, because they are better
sorted and follows the filetypes menu layout.
Make all encoding combo box display a list with encodings grouped by
categories into sub-menus, making it easier to find the appropriate
encoding than in a big single-level list.
This is what was used in the Open dialog, but not in the Preferences
dialog or the Find in Files dialog. This also makes the encoding
combo boxes behave more like the encoding menus.
Don't use wildcards to select files to install, nor manually perform
the installation when Automake could do it for us.
Using wildcards makes it hard to know what will really be installed,
and may results in installing files not part of the distribution.
Watch the lifetime of objects referenced in plugin->signal_ids and
remove our references to them if they get destroyed. This avoids
possibly trying to disconnect signals on destroyed objects when the
plugin is unloaded.
Supporting this case is safer, and is useful for objects that may or
may not outlive the plugin (like ScintillaObjects), because in such
cases plugin_signal_connect() is handy to make sure the signals are
disconnected if the object is still alive, but used to crash if the
object was destroyed.
There is no point in runner.sh depending on the generated Geany
executable, and this breaks running `make distcheck` before building
the sources, as the Geany executable doesn't exist yet.
When quitting, we still have to destroy the Scintilla widget to avoid
any possibility for us to receive signals from it after we destroyed
the associated editor and/or document (used in signal handlers).
I myself don't suffer from the issue, but it is theoretically possible
for Scintilla to emit signals anytime before it is destroyed, so it is
safer like this anyway. And an user on IRC suffered from crashes on
quit because of this issue, so it seems to actually happen in some
situations.
On Windows we need to change the working directory on startup to not
lock the directory Geany was started from (bug #2626124).
However we can't change the directory to late in the startup process
otherwise plugins maybe unable to load resources from the installation
directory.
Though we also can't change it too early otherwise opening files given
with relative paths in Geany from the command line won't work anymore
(bug #3613096).
This change should fix both issues by changing the working directory after
command line file handling happened and before plugins will be loaded.
