Exceptions and Errors should be displayed in a better way

When using development version exceptions and error crashes are common. We should add some high level try&catch which would allow FusionDirectory to show the Error from the plugin while still showing the menu and title bar when possible.

We need to make sure:

1. It does not cause problems when using PHP 5.6 (Error class is new in PHP7)
2. The stack trace is easy to read
3. The stack trace and error is easy to copy&paste to issues and email

added PJ1802-0188 label

By Côme Chilliet on 2018-07-23T14:38:36 (imported from GitLab)

created branch 5859-exceptions-and-errors-should-be-displayed-in-a-better-way

By Côme Chilliet on 2018-07-25T11:37:51 (imported from GitLab)

mentioned in merge request !345

By Côme Chilliet on 2018-07-25T11:37:53 (imported from GitLab)

mentioned in commit 3c7d271f

By Côme Chilliet on 2018-07-25T14:08:47 (imported from GitLab)

added 2h of time spent at 2018-07-25

By Côme Chilliet on 2018-07-25T15:25:53 (imported from GitLab)

added To Be Tested label

By bmortier on 2018-08-31T14:20:58 (imported from GitLab)

added fusiondirectory-core label

By bmortier on 2018-10-29T16:08:45 (imported from GitLab)

assigned to @jswaelens and unassigned @MCMic

By bmortier on 2019-06-06T19:45:55 (imported from GitLab)

changed due date to June 10, 2019

By bmortier on 2019-06-06T19:45:58 (imported from GitLab)

I close it for now, if it needed we reopen it later

By Jonathan Swaelens on 2019-06-13T13:40:57 (imported from GitLab)

closed

By Jonathan Swaelens on 2019-06-13T13:40:57 (imported from GitLab)

added 5m of time spent at 2019-06-13

By Jonathan Swaelens on 2019-06-13T13:40:58 (imported from GitLab)

removed due date

By Jonathan Swaelens on 2019-06-13T13:40:58 (imported from GitLab)

added Added label and removed To Be Tested label