w2layout fixes

cf. commit SHA-1: 50ecd12ce71a44717f8ec223a2fa225887ccff6d * w2layout fixes:

- there is no object attribute called 'resizabled' - it's called 'resizable' (typo 2x?)

- the panel name itself ('main', ...) is never a valid jQuery selector, there's the constructed id `pname` for that (coding mistake?)

- obj.resizable is checked everywhere as being truthy/falsy except in one place where it is explicitly checked against `true` using `===`: this check has been brought in line with all the others.