Add optional password to Manage Hidden Icons

[Vincence1]

Checklist

• I made sure that there are no existing issues - open or closed - to which I could contribute my information.
• I made sure that there are no existing discussions - open or closed - to which I could contribute my information.
• I have read the FAQs inside the app (Menu -> About -> FAQs) and my problem isn't listed.
• I have taken the time to fill in all the required details. I understand that the request will be dismissed otherwise.
• This issue contains only one feature request.
• I have read and understood the contribution guidelines.

Feature description

Add an option to protect the Manage Hidden Icons settings item with a user-chosen password.

Why do you want this feature?

Currently anyone with access to the phone, including a smash-and-grab attacker, can long-press the background, bring up the menu, and select Manage Hidden Icons and see and use the apps that have been hidden. Users may want to password-restrict access to the hidden icons which might include banking apps, bitcoin wallets, or other apps with sensitive information, providing a welcome additional safety layer.

Additional information

It is true that all apps can be accessed via Android settings, but there are apps to password-protect access to settings. But adding such a password protector app to Fossify Launcher as a whole won't work, since the launcher would have to be password-unlocked all the time to use it. The best solution would, I think, be to add optional password protection to the Manage Hidden Icons menu item.