#2024 Use the currently selected chat model as the default displayed when opening settings to update parameters

[chrisbarrera]

…x to the currently selected chat model

Describe your changes

As described in issue #2024 the model/character settings does not default to the currently selected chat model when opened. This commit addresses that.

Issue ticket number and link

#2024

Checklist before requesting a review

• I have performed a self-review of my code.
• If it is a core feature, I have added thorough tests.
• I have added thorough documentation for my code.
• I have tagged PR with relevant project labels. I acknowledge that a PR without labels may be dismissed.
• If this PR addresses a bug, I have provided both a screenshot/video of the original bug and the working solution.

Steps to Reproduce

Described in #2024

[chrisbarrera]

Just a comment on the actual behavior of this change:

1. When a model is selected in chat, it will be the first model seen in settings (model/character combobox) when opened. (desirable behavior)
2. If other model(s) are selected in the settings model/character combobox, and settings is closed and reopened, the most recently selected model in the settings model/character combobox will be visible. (reasonable behavior, though not entirely consistent with the purpose of this change)
3. If a new model is selected in chat following (2) above, behavior per (1) above will be seen (i.e. the selected chat model will be the first seen in settings). (desirable behavior)