Convert chart data source tab page & dialog to .ui

Conflicts:
	chart2/source/controller/dialogs/dlg_DataSource.cxx
	chart2/source/controller/inc/dlg_DataSource.hxx

Change-Id: Ic3e3adc578156161f16254862e1ca33a8ad9e1f6
Reviewed-on: https://gerrit.libreoffice.org/7255
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>