Also transforms from the old 'AllAxes' setting to the new per-axis
settings the first time a build containing this code is run.

Allows greater control. Just a bit left to do on loading/saving preferences and color fill plot behaviour.

Unfortunately, I made a dumb copy-paste error last time.

This reverts commit 05391c60.

Once 2 characters have been entered in the AlgorithmDock combobox's
lineedit, all algorithms that match the entered string anywhere in
their name should pop up.

There seem to be problems on RHEL6 though so this may not stick.

Before making real code changes.

Needed for merging detector information from different
detectors banks

Quite a simple but important test, because these functions would not work via NormaliseByDetector unless they were factory registered. Also provides checking that they are types of IFunction, since the test downcasts the boost shared_ptr.