support UTF-8 in persona names

gui/griffon-app/controllers/com/muwire/gui/ContentPanelController.groovy

@@ -97,9 +97,6 @@ class ContentPanelController {
     }
     
     void saveMuWireSettings() {
-        File f = new File(core.home, "MuWire.properties")
-        f.withOutputStream {
-            core.muOptions.write(it)
-        }
+        core.saveMuSettings()
     }
 }

gui/griffon-app/controllers/com/muwire/gui/MainFrameController.groovy

@@ -299,10 +299,7 @@ class MainFrameController {
     }
 
     void saveMuWireSettings() {
-        File f = new File(core.home, "MuWire.properties")
-        f.withOutputStream {
-            core.muOptions.write(it)
-        }
+        core.saveMuSettings()
     }
 
     void mvcGroupInit(Map<String, String> args) {

gui/griffon-app/controllers/com/muwire/gui/OptionsController.groovy

@@ -137,10 +137,7 @@ class OptionsController {
         model.trustListInterval = trustListInterval
         settings.trustListInterval = Integer.parseInt(trustListInterval)
 
-        File settingsFile = new File(core.home, "MuWire.properties")
-        settingsFile.withOutputStream {
-            settings.write(it)
-        }
+        core.saveMuSettings()
 
         // UI Setttings
 

gui/griffon-app/lifecycle/Ready.groovy

@@ -41,9 +41,9 @@ class Ready extends AbstractLifecycleHandler {
         def propsFile = new File(home, "MuWire.properties")
         if (propsFile.exists()) {
             log.info("loading existing props file")
-            propsFile.withInputStream {
+            propsFile.withReader("UTF-8", {
                 props.load(it)
-            }
+            })
             props = new MuWireSettings(props)
             if (props.incompleteLocation == null)
                 props.incompleteLocation = new File(home, "incompletes")
@@ -90,9 +90,9 @@ class Ready extends AbstractLifecycleHandler {
                 props.downloadLocation = chooser.getSelectedFile()
             }
 
-            propsFile.withOutputStream {
+            propsFile.withPrintWriter("UTF-8", {
                 props.write(it)
-            }
+            })
         }
 
         Core core