[BLUEJ-1244] Code completion on uncompiled Enums does not show anything

Code completion do not work neither on Enum class nor on Enum variables.

For example, if I have an Enum Called EnumWeek, , after "EnumWeek.", BlueJ should display ".values()" when I press Ctrl+Space.

When I have an Enum variable, as:

EnumWeek myVar = EnumWeek.Monday:

myVar. // nothing displayed by code completion

Expected : ".ordinal()"

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