[LyX/master] Make sure that screen is updated when completing math

[Jean-Marc Lasgouttes]

commit 0cbe0d7a3e91b97fdc5f622a9ca38b15490c0b88
Author: Jean-Marc Lasgouttes <lasgouttes at lyx.org>
Date:   Wed Feb 22 11:20:38 2023 +0100

    Make sure that screen is updated when completing math
    
    There was a missing update there.
    
    Fixes part of bug #12674.
---
 src/mathed/InsetMathNest.cpp |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/src/mathed/InsetMathNest.cpp b/src/mathed/InsetMathNest.cpp
index 0ef3e8f..a780a95 100644
--- a/src/mathed/InsetMathNest.cpp
+++ b/src/mathed/InsetMathNest.cpp
@@ -2144,6 +2144,7 @@ bool InsetMathNest::insertCompletion(Cursor & cur, docstring const & s, bool fin
 #endif
 		lyx::dispatch(FuncRequest(LFUN_SELF_INSERT, " "));
 	}
+	cur.screenUpdateFlags(Update::SinglePar | Update::FitCursor);
 
 	return true;
 }