core: Demote tiff and bmp image formats in the clipboard manager

Support for them appears to be way less common than e.g. png, which is
currently the preferred format from Firefox, Chromium, Libreoffice and others.
Adopt to that fact.

As a side effect, this works around a bug observed when copying images in
Firefox on Wayland.

https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1141

(cherry picked from commit 6aa546145f)

src/core/meta-clipboard-manager.c

@@ -32,12 +32,12 @@ static struct {
   const char *mimetype_glob;
   ssize_t max_transfer_size;
 } supported_mimetypes[] = {
+  { "image/tiff",               MAX_IMAGE_SIZE },
+  { "image/bmp",                MAX_IMAGE_SIZE },
   { "image/gif",                MAX_IMAGE_SIZE },
   { "image/jpeg",               MAX_IMAGE_SIZE },
   { "image/webp",               MAX_IMAGE_SIZE },
   { "image/png",                MAX_IMAGE_SIZE },
-  { "image/bmp",                MAX_IMAGE_SIZE },
-  { "image/tiff",               MAX_IMAGE_SIZE },
   { "image/svg+xml",            MAX_IMAGE_SIZE },
   { "text/plain",               MAX_TEXT_SIZE },
   { "text/plain;charset=utf-8", MAX_TEXT_SIZE },