Fix Dropdown issue

Makefile

@@ -1,5 +1,6 @@
 # gKeyMapper - Build
-# Dependencies: g++, pkg-config, msgfmt, libgtk-4-dev, libusb-1.0-0-dev, libxkbcommon-dev
+# Dependencies: g++, pkg-config, gettext (msgfmt, for the translations),
+#               libgtk-4-dev, libusb-1.0-0-dev, libxkbcommon-dev
 # Installation: sudo apt install build-essential gettext libgtk-4-dev libusb-1.0-0-dev libxkbcommon-dev
 
 CXX ?= g++
@@ -42,12 +43,15 @@ DBUS_DIR   := $(PREFIX)/share/dbus-1/services
 CXXFLAGS += -DPACKAGE=\"$(PACKAGE)\" -DLOCALEDIR=\"$(LOCALEDIR)\" -DASSETS_DIR=\"$(ASSETS_DIR)\"
 CXXFLAGS += -I$(SHARED_DIR)
 
-# Translations
+# Translations. The .pot is generated from the sources (make pot) and the
+# catalogs are merged against it (scripts/i18n.sh update); the rules are in
+# po/README.md.
 PO_FILES := $(wildcard po/*.po)
 LANGS    := $(patsubst po/%.po,%,$(PO_FILES))
 MO_FILES := $(patsubst %,locale/%/LC_MESSAGES/$(PACKAGE).mo,$(LANGS))
+I18N     := $(CURDIR)/scripts/i18n.sh
 
-.PHONY: all clean run install translations daemon
+.PHONY: all clean run install translations daemon pot i18n-check i18n-status
 
 all: $(TARGET) translations $(DAEMON)
 
@@ -72,6 +76,21 @@ locale/%/LC_MESSAGES/$(PACKAGE).mo: po/%.po
 	@mkdir -p $(@D)
 	$(MSGFMT) -o $@ $<
 
+# Regenerate po/gkeymapper.pot from the sources. "make translations" does not: a
+# pot that is written by a build is a pot that nobody has looked at, and the
+# strings are reviewed by hand (po/README.md, "Adding or changing a string").
+pot:
+	$(I18N) extract
+
+# Everything that can be wrong with the translations at once: the pot against the
+# sources, every catalog against the pot, and the language list of the GUI against
+# po/*.po. Run it before committing a string change.
+i18n-check:
+	$(I18N) check
+
+i18n-status:
+	$(I18N) status
+
 run: $(TARGET) translations
 	GKEYMAPPER_LOCALEDIR=$(CURDIR)/locale GKEYMAPPER_ASSETS_DIR=$(CURDIR)/assets ./$(TARGET)