* Enhancement/LockTbodyHeader
Added two new variables to hold the lockhead option and the head row class (defined in cssHeader).
If the new widget option 'sortTbody_lockHead' is true, the header row will be moved back to the top of the <tbody> after sorting, this is intended to be used with the 'sortTbody_sortRows' option set to true.
This will allow the <tbody> and it's child rows to be sorted while keeping the header row at the top of the <tbody>.
* The new lockHead option now used the `sortTbody_primaryRow` value instead of the `cssHeader` value.
This means the new widget option can be used out-of-the-box, meaning the user won't need to change any default parameters in the js files.
* Changed setting to test old code.
* Roll back to master version.
* Widget sortTbodies
- Removed `lockHead` var since it's only used once
- Ammended `sortEnd` condition
