L1P Phase2 bugs 5

1. Merge master missed changes for MR!879 for Gain and ISO. Changed included.
2. Filter attributes "Last AF Solution", "Last AF Solution Temperature" and "Last AF Solution Altitude" are set by the Autofocus process and do not in normal operation need to be updated by the user, so these fields were originally read-only. However, where bad data needs to be fixed, these fields are now editable in both the "Filter Settings" popup and the "Equipment Writer".
3. Solver improvements for long tail solves where solver was struggling to find a solution (reported by Hy). Substantially increased the max iterations the solver can try to find curve and star solutions.
4. Fixed a bug in Quadratic that I noticed during testing of 3.
5. These changes have changed the solution of 1 of the focus tests so updated the golden value accordingly.