grid.save() and page refresh. Original configuration is lost if save is called in oneColumnMode  #1849

Subject of the issue

When calling grid.save() in oneColumn mode, for example after grid change, original widgets configuration is not exposed in the resulting JSON config.
We store this config in localStorage.
Then, after restoring the grid in a different session (reloading the page) , loading config from storage, there is no way to deduce the original config, every widget has w = 1 and is misplaced.

Your environment

• 4.2.5 HTML
• chrome/win

Expected behavior

The save method should generate a config that can help the grid to reload correctly.

Actual behavior

Calling save in oneColumn mode and storing the result, is resulting in a wrong original widget configuration if loading from localStorage in a following page reload.