Bug: formatter not working when template-expand is used in defsrc or deflayer

[rszyma]

e.g. this defsrc will stop any formatting because currently validity of defsrc is checked by counting number of items, without expanding accounting for expanded number of items after template-expand.

(defsrc
  grv  1    2    3    4    5    6    7    8    9    0    -    =    bspc
  tab  q    w    e    r    t    y    u    i    o    p    [    ]    \
  caps (template-expand home-row j)                            ret
  lsft z    x    c    v    b    n    m    ,    .    /    rsft
  lctl lmet lalt           spc            ralt rmet rctl
)

Similarly, template-expand will not format deflayers with template-expand for the same reason.