message: Fixed (unlikely) Ini saving crash if the ImGuiWindowFlags_NoSavedSettings gets removed from a window after its creation + minor FAQ tweaks
diff: - What is ImTextureID and how do I display an image?
  - I integrated ImGui in my engine and the text or lines are blurry..
  - I integrated ImGui in my engine and some elements are clipping or disappearing when I move windows around..
  - - How can I have multiple widgets with the same label? Can I have widget without a label? (Yes). A primer on the purpose of labels/IDs.
  + - How can I have multiple widgets with the same label? Can I have widget without a label? (Yes). A primer on labels/IDs.
  - How can I tell when ImGui wants my mouse/keyboard inputs VS when I can pass them to my application?
  - How can I load a different font than the default?
  - How can I easily use icons in my application?
  Q: I integrated ImGui in my engine and some elements are clipping or disappearing when I move windows around..
  A: Most likely you are mishandling the clipping rectangles in your render function. Rectangles provided by ImGui are defined as (x1=left,y1=top,x2=right,y2=bottom) and NOT as (x1,y1,width,height).
  - Q: Can I have multiple widgets with the same label? Can I have widget without a label? (Yes)
  + Q: Can I have multiple widgets with the same label? Can I have widget without a label?
  A: Yes. A primer on the use of labels/IDs in ImGui..
  - Elements that are not clickable, such as Text() items don't need an ID.
  @@ -2667,6 +2667,8 @@ static void SaveIniSettingsToDisk(const char* ini_filename)
  if (window->Flags & ImGuiWindowFlags_NoSavedSettings)
  continue;
  ImGuiIniData* settings = FindWindowSettings(window->Name);
  + if (!settings) // This will only return NULL in the rare instance where the window was first created with ImGuiWindowFlags_NoSavedSettings then had the flag disabled later on. We don't bind settings in this case (bug #1000).
  + continue;
  settings->Pos = window->Pos;
  settings->Size = window->SizeFull;
  settings->Collapsed = window->Collapsed;
  