[MSPAINT] Improve behaviour on memory shortage (#7780)

Improve UX on memory shortage.
JIRA issue: CORE-20020
- Clear history on memory shortage.
- Improve CCanvasWindow::OnPaint on memory
  shortage.
- Add null check in CCanvasWindow::DoDraw.
- Retire using of cache in CCanvasWindow.

base/applications/mspaint/history.cpp

@@ -130,6 +130,7 @@ void ImageModel::PushImageForUndo()
     if (hbm == NULL)
     {
         ShowOutOfMemory();
+        ClearHistory();
         return;
     }
 
@@ -143,6 +144,7 @@ void ImageModel::PushImageForUndo(HBITMAP hbm)
     if (hbm == NULL)
     {
         ShowOutOfMemory();
+        ClearHistory();
         return;
     }
 
@@ -201,6 +203,7 @@ void ImageModel::Crop(int nWidth, int nHeight, int nOffsetX, int nOffsetY)
     if (!hbmNew)
     {
         ShowOutOfMemory();
+        ClearHistory();
         return;
     }