ui: font size and button margin fixes

Change-Id: I604a0f2422808a1476027f01e3c8d92b3b485a18
diff --git a/mainwindow.h b/mainwindow.h
index d73568d..7645325 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -80,12 +80,11 @@
     ScreenEnum lastScr_;
     int lastAccountCount_;
     Qt::WindowFlags flags_;
-    float currentScalingRatio_ = 1.0;
+    float currentScalingRatio_;
 
     void readSettingsFromRegistry();
 
     Ui::MainWindow* ui;
     QNetworkConfigurationManager netManager_;
     QMetaObject::Connection screenChangedConnection_;
-    QMetaObject::Connection activeChangedConnection_;
 };