Sort log values by a user defined string.

[mantid-builder]

Original Reporter: Robert Whitley

A box should be included on the results table tab which the user can enter a string.

The string should be in the format:

 ```logType1;logType2;logType3;```

(remembering to remove trailing and leading spaces)

This string will contain the preferred logs the user wants to use and they should therefore be populated at the top of the table.

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Keywords: Clarify

[mantid-builder]

This issue was originally trac ticket 5302