UI: Rename UI files for consistency

Changes comboBox-* and spinBox-* files to lowercase to be more
consistent with the rest of the files in the UI directory.

UI/combobox-ignorewheel.cpp

@@ -0,0 +1,14 @@
+#include "combobox-ignorewheel.hpp"
+
+ComboBoxIgnoreScroll::ComboBoxIgnoreScroll(QWidget *parent) : QComboBox(parent)
+{
+	setFocusPolicy(Qt::StrongFocus);
+}
+
+void ComboBoxIgnoreScroll::wheelEvent(QWheelEvent *event)
+{
+	if (!hasFocus())
+		event->ignore();
+	else
+		QComboBox::wheelEvent(event);
+}