default sountfont: use original name

The name default.sf3 is no longer required, the soundfont name is resolved
directly so use the original name. It is TimGM6mb derivative with just
piano downloaded from:
<https://musical-artifacts.com/artifacts/2642>

Author: MartinPulec

Makefile.in

@@ -694,7 +694,7 @@ install: all
 	$(INSTALL) -d -m 755 $(DESTDIR)$(man1dir)
 	if [ -n '@MANPAGES@' ]; then $(INSTALL) -m 644 @MANPAGES@ $(DESTDIR)$(man1dir); fi
 	if [ -n '@DLL_LIBS@' ]; then  $(INSTALL) -m 644 @DLL_LIBS@ $(DESTDIR)$(bindir); fi
-	$(INSTALL) -D -m 644 "$(srcdir)"/share/ultragrid/default.sf3 -t "$(DESTDIR)$(datarootdir)/ultragrid"
+	$(INSTALL) -D -m 644 "$(srcdir)"/share/ultragrid/TimGM6mb_but_fixed__piano_.sf3 -t "$(DESTDIR)$(datarootdir)/ultragrid"
 	if [ -n "@VULKAN@" ]; then\
 		$(INSTALL) -D -m 644 "$(srcdir)/share/ultragrid/vulkan_shaders/"* -t "$(DESTDIR)$(datadir)/ultragrid/vulkan_shaders"; \
 	fi
@@ -717,7 +717,7 @@ uninstall:
 		$(RM) $(DESTDIR)$(datadir)/metainfo/cz.cesnet.ultragrid.appdata.xml;\
 		$(RM) $(DESTDIR)$(datadir)/pixmaps/ultragrid.png;\
 	fi
-	$(RM) $(DESTDIR)$(datarootdir)/ultragrid/default.sf3
+	$(RM) $(DESTDIR)$(datarootdir)/ultragrid/TimGM6mb_but_fixed__piano_.sf3
 	if [ -n "@VULKAN@" ]; then\
 		$(RM) "$(DESTDIR)$(datadir)/ultragrid/vulkan_shaders/"*;\
 		rmdir $(DESTDIR)$(datadir)/ultragrid/vulkan_shaders;\

share/ultragrid/default.sf3 …ultragrid/TimGM6mb_but_fixed__piano_.sf3share/ultragrid/default.sf3 renamed to share/ultragrid/TimGM6mb_but_fixed__piano_.sf3 share/ultragrid/default.sf3 renamed to share/ultragrid/TimGM6mb_but_fixed__piano_.sf3

@@ -184,7 +184,7 @@ get_soundfont()
                 return strdup(env_fs);
         }
         char bundled[MAX_PATH_SIZE];
-        snprintf_ch(bundled, "%s/%s", get_data_path(), "default.sf3");
+        snprintf_ch(bundled, "%s/%s", get_data_path(), "TimGM6mb_but_fixed__piano_.sf3");
         const char *sf_candidates[] = {
                 "/usr/share/soundfonts/default.sf2",
                 "/usr/share/soundfonts/default.sf3",