Filter: support imperial units

1) Choose the correct conversion function for comparison.
2) Add a unit suffix to the fields.
3) Update the suffixes on change of preferences.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>

1 files changed, 2 insertions, 0 deletions

diff --git a/desktop-widgets/filterwidget2.h b/desktop-widgets/filterwidget2.h
index f8bdf4274..ab388ba6a 100644
--- a/desktop-widgets/filterwidget2.h
+++ b/desktop-widgets/filterwidget2.h
@@ -27,6 +27,8 @@ protected:
 public slots:
 	void updatePlanned(int value);
 	void updateLogged(int value);
+private slots:
+	void temperatureChanged();
 
 private:
 	Ui::FilterWidget2 ui;