[MSPAINT] Improve Zoom tool (#5798)

- Delete global zoomTo function.
- Add CCanvasWindow::zoomTo and
  CCanvasWindow::getNewZoomRect functions.
- Rename CCanvasWindow::updateScrollInfo as
  CCanvasWindow::updateScrollRange.
- Rename CCanvasWindow::resetScrollPos as
  CCanvasWindow::updateScrollPos.
- Draw the proper zoom rectangle on mouse move.
- Revert the active tool on click when the tool
  was Zoom.
CORE-19094

base/applications/mspaint/history.cpp

@@ -16,7 +16,7 @@ void ImageModel::NotifyImageChanged()
 {
     if (canvasWindow.IsWindow())
     {
-        canvasWindow.updateScrollInfo();
+        canvasWindow.updateScrollRange();
         canvasWindow.Invalidate();
     }