respect field column span and disable scrolling on combo fields

project/effectfields/fontfield.cpp

@@ -1,8 +1,9 @@
 #include "fontfield.h"
 
-#include <QComboBox>
 #include <QFontDatabase>
 
+#include "ui/comboboxex.h"
+
 FontField::FontField(EffectRow* parent, const QString &id) :
   EffectField(parent, id, EFFECT_FIELD_FONT)
 {
@@ -18,7 +19,9 @@ QString FontField::GetFontAt(double timecode)
 
 QWidget *FontField::CreateWidget()
 {
-  QComboBox* fcb = new QComboBox();
+  ComboBoxEx* fcb = new ComboBoxEx();
+
+  fcb->setScrollingEnabled(false);
 
   fcb->addItems(font_list);