Keep all annotation objects in a single list (annotation_list),

Keep all annotation objects in a single list (annotation_list),
instead of having three separate lists for text, rectangle and
oval objects.

In configuration file, deprecate text, rectangle, and oval object
classes, and replace them with a single annotation class.  The
type of annotation objects can be determined via proc nodeType.

Add an "xxx xxx xxx" asert in textConfigApply in a suspicious branch.

Remove the request for "raising" canvas objects tagged as "menuBubble"
in proc raiseAll, since it seems to be never used.

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