[Patch-1.5] Fix bug 4211: Unexpected window closing when typing space after switching between 2 documents with the file->Open dialog

[Abdelrazak Younes]

Simple and straight forward.

Juergen?

Index: LyXView.cpp
===================================================================
--- LyXView.cpp (revision 20349)
+++ LyXView.cpp (working copy)
@@ -192,6 +192,7 @@
        updateTab();
        busy(false);
        work_area_->redraw();
+       setFocus();
 }