Right Mouse button on LayerControl doesn't result in a context menu, in RVF.

[jipclaassens]

Reproduce:
mapview of:
/Indicatoren/Y2050/ClaimRealisatie/Per_AllocRegio/Provincie/Claim_realisatie/Verblijfsrecreatie/Verblijfsrecreatie

then right-mouse on layer

Direct cause: too many menu-sub-items as a result of many classification candidates for this layer

[MaartenHilferink]

These fixes will be available in v16.0.0