v2.5-rc4

What's Changed

• fix unstable test by @petrjasek in #620
• store next page in session instead of url by @petrjasek in #619
• [CPCN-414] fix: Send notification schedule date in utc for templates by @MarkLark86 in #623
• check user authorization on api calls by @petrjasek in #627
• fix account is disabled error for saml users by @petrjasek in #631
• validate navigations assigned to topic by @petrjasek in #635
• fix display of empty topics message by @petrjasek in #638
• fix password reset not working on custom cp reset page by @petrjasek in #640
• use released version of superdesk and planning by @petrjasek in #641
• revert user validation changes by @petrjasek in #642

Full Changelog: v2.5-rc3...v2.5-rc4