[LyX/master] Remove deprecated enum value with Qt5

[Jean-Marc Lasgouttes]

commit 4b15d64f5172f622ec9747f25635a822aef725d3
Author: Jean-Marc Lasgouttes <lasgouttes at lyx.org>
Date:   Thu Nov 26 20:17:57 2020 +0100

    Remove deprecated enum value with Qt5
---
 src/frontends/qt/GuiWorkArea.cpp |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/src/frontends/qt/GuiWorkArea.cpp b/src/frontends/qt/GuiWorkArea.cpp
index 99e88bb..1c76928 100644
--- a/src/frontends/qt/GuiWorkArea.cpp
+++ b/src/frontends/qt/GuiWorkArea.cpp
@@ -1345,7 +1345,11 @@ QVariant GuiWorkArea::inputMethodQuery(Qt::InputMethodQuery query) const
 	switch (query) {
 		// this is the CJK-specific composition window position and
 		// the context menu position when the menu key is pressed.
+#if (QT_VERSION < 0x050000)
 	case Qt::ImMicroFocus: {
+#else
+	case Qt::ImCursorRectangle: {
+#endif
 		CaretGeometry const & cg = bufferView().caretGeometry();
 		return QRect(cg.left - 10 * (d->preedit_lines_ != 1),
 		             cg.top + cg.height() * d->preedit_lines_,