patch 8.0.1773: dialog messages are not translated

Problem:    Dialog messages are not translated.
Solution:   Add N_() and _() where needed. (Sergey Alyoshin)
diff --git a/src/po/Make_cyg.mak b/src/po/Make_cyg.mak
index 4ee21a1..5f6f6cc 100644
--- a/src/po/Make_cyg.mak
+++ b/src/po/Make_cyg.mak
@@ -130,11 +130,11 @@
 
 first_time:
 	$(XGETTEXT) --default-domain=$(LANGUAGE) \
-		--add-comments --keyword=_ --keyword=N_ --keyword=NGETTEXT:1,2 $(wildcard ../*.c) ../if_perl.xs ../GvimExt/gvimext.cpp $(wildcard ../globals.h) ../if_py_both.h
+		--add-comments --keyword=_ --keyword=N_ --keyword=NGETTEXT:1,2 $(wildcard ../*.c) ../if_perl.xs ../GvimExt/gvimext.cpp $(wildcard ../globals.h) ../if_py_both.h ../vim.h
 
 $(LANGUAGES):
 	$(XGETTEXT) --default-domain=$(PACKAGE) \
-		--add-comments --keyword=_ --keyword=N_ --keyword=NGETTEXT:1,2 $(wildcard ../*.c) ../if_perl.xs ../GvimExt/gvimext.cpp $(wildcard ../globals.h) ../if_py_both.h
+		--add-comments --keyword=_ --keyword=N_ --keyword=NGETTEXT:1,2 $(wildcard ../*.c) ../if_perl.xs ../GvimExt/gvimext.cpp $(wildcard ../globals.h) ../if_py_both.h ../vim.h
 	$(MV) $(PACKAGE).po $(PACKAGE).pot
 	$(CP) $@.po $@.po.orig
 	$(MV) $@.po $@.po.old
diff --git a/src/po/Make_ming.mak b/src/po/Make_ming.mak
index 6973ad7..70b2c1e 100644
--- a/src/po/Make_ming.mak
+++ b/src/po/Make_ming.mak
@@ -139,11 +139,11 @@
 
 first_time:
 	$(XGETTEXT) --default-domain=$(LANGUAGE) \
-		--add-comments --keyword=_ --keyword=N_ --keyword=NGETTEXT:1,2 $(wildcard ../*.c) ../if_perl.xs ../GvimExt/gvimext.cpp $(wildcard ../globals.h) ../if_py_both.h
+		--add-comments --keyword=_ --keyword=N_ --keyword=NGETTEXT:1,2 $(wildcard ../*.c) ../if_perl.xs ../GvimExt/gvimext.cpp $(wildcard ../globals.h) ../if_py_both.h ../vim.h
 
 $(LANGUAGES):
 	$(XGETTEXT) --default-domain=$(PACKAGE) \
-		--add-comments --keyword=_ --keyword=N_ --keyword=NGETTEXT:1,2 $(wildcard ../*.c) ../if_perl.xs ../GvimExt/gvimext.cpp $(wildcard ../globals.h) ../if_py_both.h
+		--add-comments --keyword=_ --keyword=N_ --keyword=NGETTEXT:1,2 $(wildcard ../*.c) ../if_perl.xs ../GvimExt/gvimext.cpp $(wildcard ../globals.h) ../if_py_both.h ../vim.h
 	$(MV) $(PACKAGE).po $(PACKAGE).pot
 	$(CP) $@.po $@.po.orig
 	$(MV) $@.po $@.po.old
diff --git a/src/po/Make_mvc.mak b/src/po/Make_mvc.mak
index 0f0adeb..0748bdf 100644
--- a/src/po/Make_mvc.mak
+++ b/src/po/Make_mvc.mak
@@ -119,7 +119,7 @@
 all: $(MOFILES)
 
 files:
-	$(LS) $(LSFLAGS) ..\*.c ..\if_perl.xs ..\GvimExt\gvimext.cpp ..\globals.h ..\if_py_both.h > .\files
+	$(LS) $(LSFLAGS) ..\*.c ..\if_perl.xs ..\GvimExt\gvimext.cpp ..\globals.h ..\if_py_both.h ..\vim.h > .\files
 
 first_time: files
 	set OLD_PO_FILE_INPUT=yes
diff --git a/src/po/Makefile b/src/po/Makefile
index fc78c43..386cb64 100644
--- a/src/po/Makefile
+++ b/src/po/Makefile
@@ -281,10 +281,10 @@
 checkclean:
 	rm -f *.ck
 
-$(PACKAGE).pot: ../*.c ../if_perl.xs ../GvimExt/gvimext.cpp ../globals.h ../if_py_both.h
+$(PACKAGE).pot: ../*.c ../if_perl.xs ../GvimExt/gvimext.cpp ../globals.h ../if_py_both.h ../vim.h
 	cd ..; $(XGETTEXT) --default-domain=$(PACKAGE) \
 		--add-comments --keyword=_ --keyword=N_ --keyword=NGETTEXT:1,2 \
-		*.c if_perl.xs GvimExt/gvimext.cpp globals.h if_py_both.h
+		*.c if_perl.xs GvimExt/gvimext.cpp globals.h if_py_both.h vim.h
 	mv -f ../$(PACKAGE).po $(PACKAGE).pot
 
 update-po: $(LANGUAGES)