flatpak: Stop disabling WebKitGTK's sandbox

The WebKitGTK 2.40.0 ignores the environment variable and only claims
a warning on the console, thus remove it.

configurable-dbus-prefix.patch

@@ -1,42 +0,0 @@
-diff -up evolution-3.48.1 evolution-3.48
-diff -up evolution-3.48.1/docs/evolution.1 evolution-3.48.1/docs/evolution
-diff -up evolution-3.48.1/src/modules/backup-restore/evolution-backup-tool.c.1 evolution-3.48.1/src/modules/backup-restore/evolution-backup-tool.c
---- evolution-3.48.1/src/modules/backup-restore/evolution-backup-tool.c.1	2023-11-27 13:12:25.099463743 -0500
-+++ evolution-3.48.1/src/modules/backup-restore/evolution-backup-tool.c	2023-11-27 13:14:38.640243434 -0500
-@@ -674,7 +674,7 @@ get_source_manager_reload_command (void)
- 			g_string_free (tmp, TRUE);
- 			tmp = NULL;
- 
--			base_filename = g_strdup (EDS_SOURCES_DBUS_SERVICE_NAME);
-+			base_filename = g_ascii_strdown (EDS_SOURCES_DBUS_SERVICE_NAME, -1);
- 
- 			if (!base_filename || !*base_filename) {
- 				g_free (base_filename);
-@@ -690,14 +690,16 @@ get_source_manager_reload_command (void)
- 
- 			while (!tmp) {
- 				const gchar *name;
-+				gchar *name_down;
- 
- 				name = g_dir_read_name (dir);
-+				name_down = g_ascii_strdown (name, -1);
- 
- 				if (!name)
- 					break;
- 
--				if (g_ascii_strncasecmp (name, base_filename, base_filename_len) == 0 &&
--				    g_ascii_strncasecmp (name + strlen (name) - 8, ".service", 8) == 0) {
-+				if (strstr (name_down, base_filename) != NULL &&
-+				    strncmp (name_down + strlen (name) - 8, ".service", 8) == 0) {
- 					gchar *filename;
- 
- 					filename = g_strconcat ("$DBUSDATADIR", G_DIR_SEPARATOR_S, name, NULL);
-@@ -724,6 +726,8 @@ get_source_manager_reload_command (void)
- 						g_free (str);
- 					}
- 				}
-+
-+				g_free (name_down);
- 			}
- 
- 			g_free (base_filename);

sources

@@ -1 +1 @@
-SHA512 (evolution-3.59.1.tar.xz) = 26d6d4dfcdbc3d89f88d9e24096c7ff910d221119def75d7f80a397f682be96860726832c7c62b46769ce9cfcc15e5844cbcc016facc9b21b4eb9bbb2c17360d
+SHA512 (evolution-3.46.4.tar.xz) = 349270f84ee435452601e49a942478d9ef8060638b74135478b0f531bebc7be99019be749d7acb14237e9ff042e0443db30f053465ebc9f821263d86d8d8ae95