Content localization improvements.

TOSTRING() and PRESSURE() functions.

Resources/Locale/en-US/_lib.ftl

@@ -0,0 +1,11 @@
+### Special messages used by internal localizer stuff.
+
+# Used internally by the PRESSURE() function.
+zzzz-fmt-pressure = { TOSTRING($divided, "G3") } { $places ->
+    [0] kPa
+    [1] MPa
+    [2] GPa
+    [3] TPa
+    [4] PBa
+    *[5] ???
+}