Resolve WB-431 Maximize Button and Remembering Previous Size for File Open and...

Resolve WB-431 Maximize Button and Remembering Previous Size for File Open and Manage Loaded Files.   There are maximize buttons for these dialogs on Mac and Linux.  When either of the dialogs is closed, the dialogs geometry is saved and restored when reopened so that the dialog is in the same position and of the same size when reopened.