patch 8.1.2082: some files have a weird name to fit in 8.3 characters

Problem:    Some files have a weird name to fit in 8.3 characters.
Solution:   Use a nicer names.

Filelist

@@ -92,7 +92,7 @@ SRC_ALL =	\
 		src/option.h \
 		src/optiondefs.h \
 		src/optionstr.c \
-		src/popupmnu.c \
+		src/popupmenu.c \
 		src/popupwin.c \
 		src/profiler.c \
 		src/quickfix.c \
@@ -241,7 +241,7 @@ SRC_ALL =	\
 		src/proto/ops.pro \
 		src/proto/option.pro \
 		src/proto/optionstr.pro \
-		src/proto/popupmnu.pro \
+		src/proto/popupmenu.pro \
 		src/proto/popupwin.pro \
 		src/proto/profiler.pro \
 		src/proto/quickfix.pro \
@@ -517,7 +517,7 @@ SRC_DOS =	\
 		src/testdir/Make_dos.mak \
 		src/testdir/Make_ming.mak \
 		src/testdir/dos.vim \
-		src/uninstal.c \
+		src/uninstall.c \
 		src/vim.def \
 		src/vim.rc \
 		src/vimio.h \
@@ -532,7 +532,7 @@ SRC_DOS =	\
 		nsis/gvim_version.nsh \
 		nsis/README.txt \
 		nsis/lang/*.nsi \
-		uninstal.txt \
+		uninstall.txt \
 		src/VisVim/Commands.cpp \
 		src/VisVim/Commands.h \
 		src/VisVim/DSAddIn.cpp \
@@ -852,7 +852,7 @@ BIN_AMI =	\
 # files for DOS binary (also in extra archive)
 BIN_DOS =	\
 		README_bindos.txt \
-		uninstal.txt \
+		uninstall.txt \
 
 # files for Win32 OLE binary (also in extra archive)
 BIN_OLE =	\