Save Align accuracy. Add focus position to Analyze focus info box.

Two small fixes.

1. the accuracy spinbox value was not being saved in the align tab. Save it. To test: (before) change the accuarcy spinbox, exit kstars, restart, note value wasn't saved. (after) repeat and note new value was restored.

2. Add the solved focus position to the info table in Analyze. To test: Use the analyze tab on some session with autofocus. Click on an autofocus session in the timeline. Note that several stats are displayed in the info box (lower left) but the solved focus position is not one of them. After this change note the solved position is shown in the table.