Rewrite EditDialog using Qt Designer

Create a Qt Designer form file for the edit dialog.

Clean up the edit dialog code removing some not working and not used
functionality e.g. for blob editing.

src/EditDialog.h

@@ -0,0 +1,46 @@
+#ifndef __EDITDIALOG_H__
+#define __EDITDIALOG_H__
+
+#include <QDialog>
+
+namespace Ui {
+class EditDialog;
+}
+
+class EditDialog : public QDialog
+{
+    Q_OBJECT
+
+public:
+    EditDialog(QWidget* parent = 0);
+    ~EditDialog();
+
+    int curCol;
+    int curRow;
+    QString defaultlocation;
+
+public slots:
+    virtual void reset();
+    virtual void enableExport(bool enabled);
+    virtual void setDataType(int type, int size);
+    virtual void closeEvent(QCloseEvent*);
+    virtual void loadText(QString text, int row, int col);
+    virtual void importData();
+    virtual void exportData();
+    virtual void clearData();
+    virtual void accept();
+    virtual void editTextChanged();
+
+signals:
+    void goingAway();
+    void updateRecordText(int, int, QString);
+
+protected:
+    int dataType;
+    int dataSize;
+
+private:
+    Ui::EditDialog* ui;
+};
+
+#endif