Demote qt5-style-plugins to a Suggests, because some of the themes are not working (LP: #1785401).

debian/changelog

@@ -1,6 +1,8 @@
 lxqt-config (0.13.0-0ubuntu3) UNRELEASED; urgency=medium
 
   * Run wrap-and-sort.
+  * Demote qt5-style-plugins to a Suggests, because some of the themes are not
+    working (LP: #1785401).
 
  -- Simon Quigley <tsimonq2@ubuntu.com>  Thu, 09 Aug 2018 14:13:33 -0500
 

debian/control

@@ -32,7 +32,6 @@ Recommends: disk-manager,
             lxqt-powermanagement,
             lxqt-qtplugin,
             lxqt-session,
-            qt5-style-plugins,
             system-config-printer
 Suggests: adwaita-qt,
           cmst [linux-any] | network-manager-gnome [linux-any],
@@ -42,6 +41,7 @@ Suggests: adwaita-qt,
           lxappearance,
           lxqt | lxqt-core,
           obconf-qt,
+          qt5-style-plugins,
           synaptic
 Description: LXQt system settings center
  The LXQt system settings center