Bug 1534761 - Change maximum cursor size when intersecting UI to 32 pixels. r=smaug

See bug 1445844 comment 28+ for context.

Differential Revision: https://phabricator.services.mozilla.com/D23200

--HG--
extra : moz-landing-system : lando

modules/libpref/init/StaticPrefList.h

@@ -709,7 +709,7 @@ VARCACHE_PREF(
 VARCACHE_PREF(
   "layout.cursor.block.max-size",
    layout_cursor_block_max_size,
-  uint32_t, 64
+  uint32_t, 32
 )
 
 // Debug-only pref to force enable the AccessibleCaret. If you want to