BUG #10658: FindwxWidgets USE_FILE should not include .cmake extension.

The wxWidgets_USE_FILE variable to be used with the include command
should be set to UsewxWidgets; not UsewxWidgets.cmake.

diff --git a/Modules/FindwxWidgets.cmake b/Modules/FindwxWidgets.cmake
--- a/Modules/FindwxWidgets.cmake
+++ b/Modules/FindwxWidgets.cmake
@@ -188,7 +188,7 @@
   SET(wxWidgets_USE_FILE
     "${wxWidgets_CURRENT_LIST_DIR}/UsewxWidgets.cmake")
 ELSE(EXISTS "${wxWidgets_CURRENT_LIST_DIR}/UsewxWidgets.cmake")
-  SET(wxWidgets_USE_FILE UsewxWidgets.cmake)
+  SET(wxWidgets_USE_FILE UsewxWidgets)
 ENDIF(EXISTS "${wxWidgets_CURRENT_LIST_DIR}/UsewxWidgets.cmake")
 
 #=====================================================================

STYLE: Clarified/Fixed documentation of UsewxWidgets.

diff --git a/Modules/UsewxWidgets.cmake b/Modules/UsewxWidgets.cmake
--- a/Modules/UsewxWidgets.cmake
+++ b/Modules/UsewxWidgets.cmake
@@ -1,15 +1,12 @@
-# - Convenience include for using wxWidgets library
-# Finds if wxWidgets is installed
-# and set the appropriate libs, incdirs, flags etc.
-# INCLUDE_DIRECTORIES, LINK_DIRECTORIES and ADD_DEFINITIONS
-# are called.
+# - Convenience include for using wxWidgets library.
+# Finds if wxWidgets was FOUND and set the appropriate libs, incdirs,
+# flags etc. INCLUDE_DIRECTORIES and LINK_DIRECTORIES are called.
 #
 # USAGE
-#  SET( wxWidgets_USE_LIBS  gl xml xrc ) # optionally: more than wx std libs
-#  FIND_PACKAGE(wxWidgets REQUIRED)
-#  INCLUDE( ${xWidgets_USE_FILE} )
-#  ... add your targets here, e.g. ADD_EXECUTABLE/ ADD_LIBRARY ...
-#  TARGET_LINK_LIBRARIERS( <yourWxDependantTarget>  ${wxWidgets_LIBRARIES})
+#  FIND_PACKAGE(wxWidgets REQUIRED base core gl net)
+#  INCLUDE(${wxWidgets_USE_FILE})
+#  # and for each of your dependant executable/library targets:
+#  TARGET_LINK_LIBRARIES(<YourTarget> ${wxWidgets_LIBRARIES})
 #
 # DEPRECATED
 #  LINK_LIBRARIES is not called in favor of adding dependencies per target.