usersettings are cms functionality -> should move to hippocms namespace

In repository.cnd

[hippo:usersettings] > nt:base

• hippo:path (string)
• hippo:name (string)
• hippo:value (string)

[hippo:listingpropnode] > nt:base

• * (string)

[hippo:listing] > nt:base

• hippo:pagesize (long) = '10' mandatory autocreated
• hippo:viewsize (long) = '10' mandatory autocreated
  + * (hippo:listingpropnode) = hippo:listingpropnode

Should move to frontend (cms) namespace

[frontend:listingpropnode] > nt:base

• * (string)

[frontend:listing] > nt:base

• frontend:pagesize (long) = '10' mandatory autocreated
• frontend:viewsize (long) = '10' mandatory autocreated
  + * (frontend:listingpropnode) = frontend:listingpropnode