ErrorDialog: Clear messages on close instead of hide

Fixes an issue where the error dialog is cleared because the hide event gets triggered.

src/dialogs/errordialog.cpp

@@ -28,12 +28,11 @@
 #include <QStyle>
 #include <QLabel>
 #include <QTextEdit>
+#include <QCloseEvent>
 
 #include "errordialog.h"
 #include "ui_errordialog.h"
 
-class QHideEvent;
-
 ErrorDialog::ErrorDialog(QWidget *parent)
     : QDialog(parent),
       ui_(new Ui_ErrorDialog) {
@@ -68,9 +67,13 @@ void ErrorDialog::ShowMessage(const QString &message) {
 
 }
 
-void ErrorDialog::hideEvent(QHideEvent *) {
+void ErrorDialog::closeEvent(QCloseEvent *e) {
+
   current_messages_.clear();
   UpdateContent();
+
+  QDialog::closeEvent(e);
+
 }
 
 void ErrorDialog::UpdateContent() {

src/dialogs/errordialog.h

@@ -29,7 +29,7 @@
 #include <QString>
 #include <QStringList>
 
-class QHideEvent;
+class QCloseEvent;
 class Ui_ErrorDialog;
 
 class ErrorDialog : public QDialog {
@@ -43,7 +43,7 @@ class ErrorDialog : public QDialog {
   void ShowMessage(const QString &message);
 
  protected:
-  void hideEvent(QHideEvent*) override;
+  void closeEvent(QCloseEvent *e) override;
 
  private:
   void UpdateContent();

src/dialogs/errordialog.ui

@@ -75,7 +75,7 @@
    <sender>buttonbox</sender>
    <signal>accepted()</signal>
    <receiver>ErrorDialog</receiver>
-   <slot>accept()</slot>
+   <slot>close()</slot>
    <hints>
     <hint type="sourcelabel">
      <x>299</x>
@@ -91,7 +91,7 @@
    <sender>buttonbox</sender>
    <signal>rejected()</signal>
    <receiver>ErrorDialog</receiver>
-   <slot>reject()</slot>
+   <slot>close()</slot>
    <hints>
     <hint type="sourcelabel">
      <x>299</x>