[LyX/master] Fixup 04ece4f0d6a: fix cursor position

[Jean-Marc Lasgouttes]

commit a3d58d2884976eaf6c7ea22c2caace51f8e5c566
Author: Jean-Marc Lasgouttes <lasgouttes at lyx.org>
Date:   Mon Feb 20 17:14:03 2023 +0100

    Fixup 04ece4f0d6a: fix cursor position
---
 src/insets/InsetCollapsible.cpp |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/src/insets/InsetCollapsible.cpp b/src/insets/InsetCollapsible.cpp
index d629aaa..f76dc99 100644
--- a/src/insets/InsetCollapsible.cpp
+++ b/src/insets/InsetCollapsible.cpp
@@ -424,7 +424,7 @@ void InsetCollapsible::cursorPos(BufferView const & bv,
 
 	switch (geometry(bv)) {
 	case LeftButton:
-		x += dimensionCollapsed(bv).wid;
+		x += dimensionCollapsed(bv).wid - leftOffset(&bv) / 2;
 		break;
 	case TopButton: {
 		y += dimensionCollapsed(bv).des + textdim.asc;