Clean exported headers of the Core plugin.

Change-Id: I26472d568844d5fee62323e01f5c5c12082d5450
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/coreplugin/dialogs/ioptionspage.cpp

@@ -35,6 +35,7 @@
 
 #include <QCheckBox>
 #include <QGroupBox>
+#include <QIcon>
 #include <QLabel>
 #include <QPushButton>
 
@@ -80,6 +81,11 @@
     side of the \gui Options dialog.
 */
 
+QIcon Core::IOptionsPage::categoryIcon() const
+{
+    return QIcon(m_categoryIcon);
+}
+
 /*!
     \fn QWidget *IOptionsPage::widget()
 
@@ -183,3 +189,8 @@ bool Core::IOptionsPage::matches(const QString &searchKeyWord) const
             return true;
     return false;
 }
+
+QIcon Core::IOptionsPageProvider::categoryIcon() const
+{
+    return QIcon(m_categoryIcon);
+}