[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/dib.cpp

@@ -241,7 +241,7 @@ HBITMAP InitializeImage(LPCWSTR name, LPWIN32_FIND_DATAW pFound, BOOL isFile)
 HBITMAP SetBitmapAndInfo(HBITMAP hBitmap, LPCWSTR name, LPWIN32_FIND_DATAW pFound, BOOL isFile)
 {
     // update image
-    canvasWindow.resetScrollPos();
+    canvasWindow.updateScrollPos();
     imageModel.PushImageForUndo(hBitmap);
     imageModel.ClearHistory();