Revisit the names of all our properties (strictly) following our (new) naming convention for properties

[patricekrakow]

Our (new) naming convention for properties being:

If the context is clearly given by the parent, DO NOT repeat the context in the property name; If the context is NOT adequately given by the parent, then DO give the context in the property name up to what is necessary.

Let's give an example of each case:

• within supplierOrders[], supplierOrderNumber should become number because its parent supplierOrders[] is giving the context.

• within supplierOrders[], purchaseOrderNumber should NOT become number because its parent supplierOrders[] is NOT giving the right context, it is not the number (identifier) of the supplierOrders[], but of the number (identifier) of purchaseOrders[].

[patricekrakow]

Done, see commit 23b65ed.