[Toaster] [review-request] michaelw/remove-sources-filters

[Michael Wood]

This branch contains 3 patches:

1) Removal of the Layer sources cols 
520d5193836d8b573ffa9a286a345d8c0d2aae23

2) Removal of the filters on the layers,machines and targets page 
d3147866025a13219c050cbff575a66dba2ce11e

3) Set the default pagesize on the machines to the same as layers, 
targets (100) a3fa87f4eb14b119f75c6defadce5109421c44f8

Thanks,

Michael