Doc: Update JavaScrip and QML error codes

- Add "A when condition cannot contain an object." and fix the
  typo in the user-visible text.
- Remove M325, which has been removed from the sources.

Task-number: QTCREATORBUG-31510
Change-Id: Iec793c0625496e50456a8b998ca12b2f37cd36ad
Reviewed-by: Mats Honkamaa <mats.honkamaa@qt.io>
Reviewed-by: Sami Shalayel <sami.shalayel@qt.io>
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

doc/qtcreator/src/editors/creator-code-syntax.qdoc

@@ -708,12 +708,6 @@
             and most likely invalid
         \li
 
-    \row
-        \li M325
-        \li Warning
-        \li Logical value does not depend on actual values
-        \li Removed: This warning is no longer being used since Qt Creator version 12.
-
     \row
         \li M326
         \li Error
@@ -747,6 +741,13 @@
         \li The alias property cannot reference the root component in a
             hierarchy. Create an instance of the component instead.
 
+    \row
+        \li M403
+        \li Error
+        \li A when condition cannot contain an object
+        \li Set the \c when condition to an expression that evaluates to \c true
+            when the condition is met.
+
     \endtable
 
     \section1 Resetting the Code Model

src/libs/qmljs/qmljsstaticanalysismessage.cpp

@@ -240,7 +240,7 @@ StaticAnalysisMessages::StaticAnalysisMessages()
            Tr::tr("Do not reference the root item as alias."));
     newMsg(WarnAliasReferRootHierarchy, Warning,
            Tr::tr("Avoid referencing the root item in a hierarchy."));
-    newMsg(ErrWhenConditionCannotBeObject, Error, Tr::tr("When condtion cannot contain an object."));
+    newMsg(ErrWhenConditionCannotBeObject, Error, Tr::tr("A when condition cannot contain an object."));
 }
 
 } // anonymous namespace