User Settings

[petargyurov]

Feature
Introduce a settings panel which users can use to set UI preferrences.

Additional Detail
There is a number of things in the UI which some users may prefer to change the default behaviour of. For instance:

• toggling the image transition animation
• default confidence level
• displaying the image name or the entire path (in the review panel)
• toggling various warning modals (will just remove modals for now)
• zoom level (re: zoom & pan feature) (this library is quite finicky and there isn't much styling we can do without breaking things)
• other things, as the app grows (using electron-store we can easily expand this from now on)

Proposed Mechanism
I think a simpe .json file saved in the root directory will be enough to preserve the state of the settings. The UI can read from the file to display the settings. Each change could overwrite the file, or perhaps a Save button?