Disable Wayland check on Qt >= 5.11.2

Fixes #2932

doc/changelog.asciidoc

@@ -51,6 +51,8 @@ Changed
   adblocker can be disabled on a given page.
 - Elements with a `tabindex` attribute now also get hints by default.
 - Various small performance improvements for hints and the completion.
+- The Wayland check for QtWebEngine is now disabled on Qt >= 5.11.2, as those
+  versions should work without any issues.
 
 Fixed
 ~~~~~

qutebrowser/misc/backendproblem.py

@@ -238,6 +238,9 @@ def _handle_wayland():
     if has_qt511 and config.val.qt.force_software_rendering == 'chromium':
         return
 
+    if qtutils.version_check('5.11.2', compiled=False):
+        return
+
     buttons = []
     text = "<p>You can work around this in one of the following ways:</p>"