Fixes issue 3773: Add option to ignore OpenJDK warning

Change-Id: If3af485990d39059f6df3831e70081e9c2323066
Reviewed-on: http://gerrit.dmdirc.com/882
Automatic-Compile: DMDirc Local Commits <dmdirc@googlemail.com>
Reviewed-by: Shane Mc Cormack <shane@dmdirc.com>
Reviewed-by: Chris Smith <chris@dmdirc.com>

src/com/dmdirc/addons/ui_swing/SwingController.java

@@ -657,7 +657,9 @@ public final class SwingController extends Plugin implements Serializable,
                     "Main frame not created. Unable to continue.");
         }
 
-        if (System.getProperty("java.vm.name", "unknown").contains("OpenJDK")) {
+        if (System.getProperty("java.vm.name", "unknown").contains("OpenJDK")
+                && IdentityManager.getGlobalConfig().getOptionBool(getDomain(),
+                "showjrewarning")) {
             new StandardMessageDialog(me, ModalityType.MODELESS,
                     "Unsupported JRE", "OpenJDK has known graphical "
                     + "issues and as such is unsupported by DMDirc.  Please "

src/com/dmdirc/addons/ui_swing/plugin.config

@@ -37,4 +37,5 @@ defaults:
     textpanebackground=
     textpanebackgroundoption=STRETCH
     desktopbackground=dmdirc://com/dmdirc/res/background.png
-    desktopbackgroundoption=CENTER
+    desktopbackgroundoption=CENTER
+    showjrewarning=true