Draw cursor again

src/core/Buffer.h

@@ -75,6 +75,10 @@ public:
         {
             return m_iterator < other.m_iterator;
         }
+        bool operator==(const Cursor & other) const
+        {
+            return (m_line == other.m_line) && (m_column == other.m_column);
+        }
         uint32_t operator*() const { return *m_iterator; }
         uint8_t * address() const { return m_iterator.address(); }
         bool valid() const { return m_iterator.valid(); }