message: ImVector comment
diff: @@ -1073,6 +1073,7 @@ public:
  Capacity = new_capacity;
  }
  + // NB: &v cannot be pointing inside the ImVector Data itself! e.g. v.push_back(v[10]) is forbidden.
  inline void push_back(const value_type& v) { if (Size == Capacity) reserve(_grow_capacity(Size + 1)); Data[Size++] = v; }
  inline void pop_back() { IM_ASSERT(Size > 0); Size--; }
  inline void push_front(const value_type& v) { if (Size == 0) push_back(v); else insert(Data, v); }
  