Turn some slots into normal functions

They aren't used for signal processing at the moment and don't look like
they can be used for that easily.

src/EditDialog.h

@@ -35,13 +35,11 @@ private slots:
     void setNull();
     void updateApplyButton();
     virtual void accept();
-    int checkDataType(const QByteArray& data);
     void loadData(const QByteArray& data);
     void toggleOverwriteMode();
     void editModeChanged(int newMode);
     void editTextChanged();
     void updateCellInfo(const QByteArray& data);
-    QString humanReadableSize(double byteCount) const;
 
 signals:
     void recordTextUpdated(const QPersistentModelIndex& idx, const QByteArray& data, bool isBlob);
@@ -72,6 +70,9 @@ private:
         HexEditor = 1,
         ImageViewer = 2
     };
+
+    int checkDataType(const QByteArray& data);
+    QString humanReadableSize(double byteCount) const;
 };
 
 #endif

src/EditDialog.ui

@@ -347,7 +347,6 @@
   <slot>importData()</slot>
   <slot>exportData()</slot>
   <slot>editTextChanged()</slot>
-  <slot>checkDataType()</slot>
   <slot>editModeChanged(int)</slot>
   <slot>setNull()</slot>
  </slots>