P: Filter presets are not always correctly restored when toggling Enable Filters

If you select a Library Filter bar preset, toggle off filtering with Cmd L, and toggle it back on, sometimes the previous state of the filter bar set by the preset is not properly restored. The conditions that trigger this are very obscure but highly reproducible.  To the average user, it looks entirely mysterious.

To avoid this bug, use these precise steps:

- Select any Library Filter bar preset (don't skip this step).

- Select the preset Filters Off.

- Define the preset.

Tested on a virgin installation of LR 14.1.1 on a virgin installation of Mac OS 15 (a virtual machine) -- screen recording attached. Follow these precise steps:

1. Import a JPEG.

2. In the Library Filter bar, click the preset popup and select the Camera Info preset.

3. In the Metadata browser, change the first column to File Type and select JPEG. Delete the other columns. Save as the preset "JPEG - Camera Info".

4. In the Library Filter bar preset popup, select Filters Off.

5. In the Library Filter bar, click the Metadata button.

6. In the Metadata browser, change the first column to File Type and select JPEG. Delete the other columns. Save as the preset "JPEG - Metadata".

7. In the Library Filter bar preset popup, select Filters Off.

8. Select the filter preset JPEG - Camera Info.

9. Type Cmd L (filters off) and again Cmd L (filters on).  Observe that the Library Filter bar's Attribute bar is now showing, with >= 1 star selected, and the name in the preset popup is Rated. This is incorrect:

10. Repeat steps 7 - 9, but with the preset JPEG - Metadata. Observe the the Library Filter bar's Attribute bar is not showing, and the preset popup shows JPEG - Metadata. This is correct.

It's completely mysterious to the typical user why these two versions of the preset behave differently when you disable and enable filters.  There are three related causes of this bug:

- Saving a preset with the Attribute button deselected nevertheless saves in the preset the hidden previous star rating. In particular, the preset JPEG - Camera Info was saved with these two lines in the .lrtemplate:

filtersActive = false,
minRating = 1,

The second line should have been:

minRating = "<nil>",

- When "minRating" is something other than "<nil>", the command FIle > Library Filters > Enable Filters (Cmd L) always sets "filterActive" to true, even if the previous state was false.

- The built-in preset Camera Info also contains these two lines:

filtersActive = false,
minRating = 1,

probably because the original developer had saved it after saving the Rating preset.