[gnote] Add tooltip for pin button

[Aurimas Černius <aurimasc src gnome org>]

commit ad998a05564791ff853941942a8b9f0625afcb1d
Author: Aurimas Černius <aurisc4 gmail com>
Date:   Mon Jun 3 22:40:17 2013 +0300

    Add tooltip for pin button
    
    Fixes Bug 700437.

 src/notewindow.cpp |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/notewindow.cpp b/src/notewindow.cpp
index f85e2cb..df28de6 100644
--- a/src/notewindow.cpp
+++ b/src/notewindow.cpp
@@ -388,6 +388,7 @@ namespace gnote {
     }
 
     m_pin_button = manage(new Gtk::ToolButton(*m_pin_image, _("Pin")));
+    m_pin_button->set_tooltip_text(_("Mark note as important"));
     m_pin_button->signal_clicked().connect(sigc::mem_fun(*this, &NoteWindow::on_pin_button_clicked));
     grid->attach(*m_pin_button, grid_col++, 0, 1, 1);
     notebooks::NotebookManager::obj().signal_note_pin_status_changed