OptionsPopup: duplication of ssh keys, making the interface unusable …

[alinsalaru]

…after a period of time

The Problem:

• When loading saved SSH keys from settings, appending occurred to the
  existing model without clearing it first
• Each time you saved settings, the keys would get duplicated exponentially: 1 → 2 →
  4 → 8 → 16 → ...

This means that every time the dialog opens, it appends the saved keys to whatever keys are already in the model, possible culprit to bloating performance to whole app.

Related with: #1160

[alinsalaru]

@tdewey-rpi really appreciate the work you've done for this project!
Can you please look at into this? it's a small change but offers a good performance improvement.

All the best in the world!

[lurch]

The qml branch corresponds to the 1.9.x releases of RPi Imager, but I believe that active-development of Imager has now switched to the main branch (for the upcoming 2.0.x releases).

[alinsalaru]

Indeed, my mistake, will follow on main branch.
And close this, thank you @lurch