Related: tdf#150706 & tdf#153330 add OK and CANCEL to known controls

which results that we can rename "Save" to "Export" in pdf export dialog

Change-Id: I8186a9ea3d18bfb383b07ba54f2fd7a5cd71e7b9
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/141004
Tested-by: Caolán McNamara <caolanm@redhat.com>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
(cherry picked from commit 1da3406a8e97934615b5b644cbb81bf3108143ec)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/146520
Reviewed-by: Michael Stahl <michael.stahl@allotropia.de>
Tested-by: Michael Stahl <michael.stahl@allotropia.de>
diff --git a/vcl/unx/gtk3/fpicker/SalGtkFilePicker.cxx b/vcl/unx/gtk3/fpicker/SalGtkFilePicker.cxx
index cdb31b3..fc990b6 100644
--- a/vcl/unx/gtk3/fpicker/SalGtkFilePicker.cxx
+++ b/vcl/unx/gtk3/fpicker/SalGtkFilePicker.cxx
@@ -1102,6 +1102,10 @@ GtkWidget *SalGtkFilePicker::getWidget( sal_Int16 nControlId, GType *pType )
            pWidget = m_pToggles[elem]; tType = GTK_TYPE_CHECK_BUTTON; \
            break
#define MAP_BUTTON( elem ) \
        case CommonFilePickerElementIds::PUSHBUTTON_##elem: \
            pWidget = m_pButtons[elem]; tType = GTK_TYPE_BUTTON; \
            break
#define MAP_EXT_BUTTON( elem ) \
        case ExtendedFilePickerElementIds::PUSHBUTTON_##elem: \
            pWidget = m_pButtons[elem]; tType = GTK_TYPE_BUTTON; \
            break
@@ -1124,7 +1128,9 @@ GtkWidget *SalGtkFilePicker::getWidget( sal_Int16 nControlId, GType *pType )
        MAP_TOGGLE( LINK );
        MAP_TOGGLE( PREVIEW );
        MAP_TOGGLE( SELECTION );
        MAP_BUTTON( PLAY );
        MAP_BUTTON( OK );
        MAP_BUTTON( CANCEL );
        MAP_EXT_BUTTON( PLAY );
        MAP_LIST( VERSION );
        MAP_LIST( TEMPLATE );
        MAP_LIST( IMAGE_TEMPLATE );
@@ -1386,7 +1392,7 @@ void SAL_CALL SalGtkFilePicker::setLabel( sal_Int16 nControlId, const OUString& 

    if( !( pWidget = getWidget( nControlId, &tType ) ) )
    {
        SAL_WARN( "vcl.gtk", "Set label on unknown control " << nControlId);
        SAL_WARN( "vcl.gtk", "Set label '" << rLabel << "' on unknown control " << nControlId);
        return;
    }

@@ -1778,18 +1784,17 @@ void SalGtkFilePicker::impl_initialize(GtkWidget* pParentWidget, sal_Int16 templ
    }

    gtk_file_chooser_set_action( GTK_FILE_CHOOSER( m_pDialog ), eAction);
    gtk_dialog_add_button(GTK_DIALOG( m_pDialog ),
                          getCancelText().getStr(),
                          GTK_RESPONSE_CANCEL);
    for( int nTVIndex = 0; nTVIndex < BUTTON_LAST; nTVIndex++ )
    m_pButtons[CANCEL] = gtk_dialog_add_button(GTK_DIALOG(m_pDialog), getCancelText().getStr(), GTK_RESPONSE_CANCEL);
    mbButtonVisibility[CANCEL] = true;

    if (mbButtonVisibility[PLAY])
    {
        if( mbButtonVisibility[nTVIndex] )
        {
            OString aPlay = OUStringToOString( getResString( PUSHBUTTON_PLAY ), RTL_TEXTENCODING_UTF8 );
            m_pButtons[ nTVIndex ] = gtk_dialog_add_button( GTK_DIALOG( m_pDialog ), aPlay.getStr(), 1 );
        }
        OString aPlay = OUStringToOString(getResString(PUSHBUTTON_PLAY), RTL_TEXTENCODING_UTF8);
        m_pButtons[PLAY] = gtk_dialog_add_button(GTK_DIALOG(m_pDialog), aPlay.getStr(), 1);
    }
    gtk_dialog_add_button( GTK_DIALOG( m_pDialog ), first_button_text, GTK_RESPONSE_ACCEPT );

    m_pButtons[OK] = gtk_dialog_add_button(GTK_DIALOG(m_pDialog), first_button_text, GTK_RESPONSE_ACCEPT);
    mbButtonVisibility[OK] = true;

    gtk_dialog_set_default_response( GTK_DIALOG (m_pDialog), GTK_RESPONSE_ACCEPT );

diff --git a/vcl/unx/gtk3/fpicker/SalGtkFilePicker.hxx b/vcl/unx/gtk3/fpicker/SalGtkFilePicker.hxx
index c412478..fdc701a 100644
--- a/vcl/unx/gtk3/fpicker/SalGtkFilePicker.hxx
+++ b/vcl/unx/gtk3/fpicker/SalGtkFilePicker.hxx
@@ -170,6 +170,8 @@ class SalGtkFilePicker : public SalGtkPicker, public SalGtkFilePicker_Base
        bool mbToggleVisibility[TOGGLE_LAST];

        enum {
            OK,
            CANCEL,
            PLAY,
            BUTTON_LAST };