Gambas 3.6.2

[DEVELOPMENT ENVIRONMENT]
* NEW: Improve Cygwin System Information awareness.
* BUG: Control properties containing a database table name can be modified
  again.

[GB.DATA]
* BUG: Don't use forward typedefs as some compilers don't seem to
  understand them.
* BUG: Silence false positive compiler warnings.

[GB.DB.MYSQL]
* BUG: Try to reconnect to a lost database server when listing existing
  databases and the fields of a table.

[GB.FORM]
* NEW: The SliderBox is now in the same change group as Slider.

[GB.GTK]
* BUG: Fix an uninitialized variable.
* BUG: Fix warning with Slider or SpinBox when setting a minimum value
  equal to the maximum value, or the contrary.

[GB.GTK3]
* BUG: Fix an uninitialized variable.
* BUG: Fix warning with Slider or SpinBox when setting a minimum value
  equal to the maximum value, or the contrary.
* BUG: Paint.Reset() now works as expected on non-cached DrawingArea.

[GB.GUI.AREA]
* BUG: TreeView renaming works now if the renamed item is not visible.

[GB.MEDIA.FORM]
* BUG: MediaView: The Control property has been renamed as ShowControl.

[GB.QT4]
* BUG: The Menu.Checked property now returns the correct value for
  non-radio menu items.
* BUG: TextBox: Workaround a Qt4 weird behaviour that sometimes lose the
  selection. Same workaround for editable ComboBox.
* BUG: Fix a compilation warning.