Remove apostrophes from instances of possessive "its".

I noticed one instance of this while looking at the code the other day,
and after a quick grep, realized it happened a *lot*!  One of the many
frustrating things about the English language is that we use apostrophes
to make pretty much everything possessive *except* the pronoun "it".
In that case, we use "its".  "It's" is reserved for the contraction
meaning "it is" or "it has".

WindowMaker/menu.fi.in

@@ -53,7 +53,7 @@
  *	// it in current position
  *	OPEN_MENU file.menu
  *   2. Pipe menu handling.
- *	// opens command and uses it's stdout to construct menu.
+ *	// opens command and uses its stdout to construct menu.
  *	// Command's output must be a valid menu description.
  *	// The space between '|' and command itself is optional.
  *	OPEN_MENU | command

WindowMaker/menu.he

@@ -45,7 +45,7 @@
  *	// it in current position
  *	OPEN_MENU file.menu
  *   2. Pipe menu handling.
- *	// opens command and uses it's stdout to construct menu.
+ *	// opens command and uses its stdout to construct menu.
  *	// Command's output must be a valid menu description.
  *	// The space between '|' and command itself is optional.
  *	OPEN_MENU | command

WindowMaker/menu.hr

@@ -45,7 +45,7 @@
  *	// it in current position
  *	OPEN_MENU file.menu
  *   2. Pipe menu handling.
- *	// opens command and uses it's stdout to construct menu.
+ *	// opens command and uses its stdout to construct menu.
  *	// Command's output must be a valid menu description.
  *	// The space between '|' and command itself is optional.
  *	OPEN_MENU | command

WindowMaker/menu.ro.in

@@ -53,7 +53,7 @@
  *	// it in current position
  *	OPEN_MENU file.menu
  *   2. Pipe menu handling.
- *	// opens command and uses it's stdout to construct menu.
+ *	// opens command and uses its stdout to construct menu.
  *	// Command's output must be a valid menu description.
  *	// The space between '|' and command itself is optional.
  *	OPEN_MENU | command

WindowMaker/menu.sl

@@ -53,7 +53,7 @@
  *	// it in current position
  *	OPEN_MENU file.menu
  *   2. Pipe menu handling.
- *	// opens command and uses it's stdout to construct menu.
+ *	// opens command and uses its stdout to construct menu.
  *	// Command's output must be a valid menu description.
  *	// The space between '|' and command itself is optional.
  *	OPEN_MENU | command

WindowMaker/menu.zh_CN

@@ -53,7 +53,7 @@
  *	// it in current position
  *	OPEN_MENU file.menu
  *   2. Pipe menu handling.
- *	// opens command and uses it's stdout to construct menu.
+ *	// opens command and uses its stdout to construct menu.
  *	// Command's output must be a valid menu description.
  *	// The space between '|' and command itself is optional.
  *	OPEN_MENU | command

WindowMaker/menu.zh_TW.in

@@ -52,7 +52,7 @@
  *	// it in current position
  *	OPEN_MENU file.menu
  *   2. Pipe menu handling.
- *	// opens command and uses it's stdout to construct menu.
+ *	// opens command and uses its stdout to construct menu.
  *	// Command's output must be a valid menu description.
  *	// The space between '|' and command itself is optional.
  *	OPEN_MENU | command