Pref: Wb: remove args first element on restart.

- isRebootRequired is not public but in accept&reject.
- PreferencePage::isRebootRequired changed to const
- Change 2 warnings to log
- remove useless  c_str()
- Change DlgPreferencesImp::isRebootRequired name + reboot by restart everywhere.
- Sort workbenches so that disabled wb are sorted.

src/Gui/PropertyPage.cpp

@@ -98,7 +98,7 @@ void PropertyPage::onReset()
 // ----------------------------------------------------------------
 
 /** Construction */
-PreferencePage::PreferencePage(QWidget* parent) : QWidget(parent), rebootRequired(false)
+PreferencePage::PreferencePage(QWidget* parent) : QWidget(parent), restartRequired(false)
 {
 }
 
@@ -107,14 +107,14 @@ void PreferencePage::changeEvent(QEvent* event)
     QWidget::changeEvent(event);
 }
 
-bool PreferencePage::isRebootRequired()
+bool PreferencePage::isRestartRequired() const
 {
-    return rebootRequired;
+    return restartRequired;
 }
 
-void PreferencePage::requireReboot()
+void PreferencePage::requireRestart()
 {
-    rebootRequired = true;
+    restartRequired = true;
 }