Enhance image sorting options

[seniordevel]

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 a sorting option item -or- add a setting to choose how image modification date is evaluated.

e.g. sorting item 'Last modified by file date'
-or-
a preference 'Date evaluation: byMetadata || byFileProperties'

Why do you want this feature?

Currently image modification date is evaluated by using image metadata such as exif. This is of great advantage to sort a special type of images: Personal photos for example.

But for users mainly dealing with downloaded images this way of sorting is of disadvantage. In this case it would be better to use the File.lastModified() API to match the download date.

Additional information

This feature request refers to issue #399

[naveensingh]

Closed as duplicate because the original bug report was valid.