qt: define QT_NO_KEYWORDS

QT_NO_KEYWORDS prevents Qt from defining the `foreach`, `signals`,
`slots` and `emit` macros.

Avoid overlap between Qt macros and boost - for example #undef hackiness
in #6421.

Conflicts:
	src/qt/addressbookpage.cpp
	src/qt/peertablemodel.cpp
	src/qt/receivecoinsdialog.cpp
	src/qt/rpcconsole.cpp

Rebased-From: d29ec6c2301e593d577126d1ca85b93307b32bf1
Github-Pull: #6433

1 files changed, 1 insertions, 1 deletions

diff --git a/src/qt/qvaluecombobox.cpp b/src/qt/qvaluecombobox.cpp
index f73268c958..800436661f 100644
--- a/src/qt/qvaluecombobox.cpp
+++ b/src/qt/qvaluecombobox.cpp
@@ -27,5 +27,5 @@ void QValueComboBox::setRole(int role)
 
 void QValueComboBox::handleSelectionChanged(int idx)
 {
-    emit valueChanged();
+    Q_EMIT valueChanged();
 }