Allow users to set timezone display for an individual account

[chigix]

Is your feature request related to a problem? Please describe. A normal users in wallabag have no option to set the target timezone for themselves. It results in that users have to accept the time displayed in their article archives according to the default timezone setting in the php runtime.

Describe the solution you'd like Add a setting field in normal user's config menu to allow them to choose the target timezone for displaying time record.

[bcutter]

One of the first things I discovered.

Time shown in a freshly added item is not matching the actual time, basically giving just wrong information.

Example:

Time added shown: 21:37 Actual time added: 23:37

UTC +2