Removes Support for sg_seo < 5.0

[FEATURE] Allow more than one company assignment, Fix broken mail sending of unsolicited applications

[TASK] Release of version 4.1.3, Disallow pagination pages greater than the maximum allowed number of possible pages

[TASK] Change layout of application form
[TASK] Rename variables

[FEATURE] Introduce the path_segment field that allows to give proper URLs yourself, Also a lot of cleanup was done