mainview: fix side panel size

Change-Id: I414b8f2f482f4fef436156be1d3edd538ff36c06
diff --git a/src/mainview/MainView.qml b/src/mainview/MainView.qml
index 9279f2d..e3b2a52 100644
--- a/src/mainview/MainView.qml
+++ b/src/mainview/MainView.qml
@@ -36,12 +36,12 @@
 Window {
     id: mainViewWindow
 
-    property int minWidth: sidePanelViewStackPreferredWidth
+    property int minWidth: 400
     property int minHeight: aboutPopUpDialog.contentHeight
 
     property int mainViewWindowPreferredWidth: 650
     property int mainViewWindowPreferredHeight: 600
-    property int sidePanelViewStackPreferredWidth: 400
+    property int sidePanelViewStackPreferredWidth: 250
     property int mainViewStackPreferredWidth: 250
     property int aboutPopUpPreferredWidth: 250