set app_color to allow null so we can revert the commit 8c77
Revert "#948 Optimizations to avoid Error 502"

This reverts commit 8c77dbf8f8017da056aa69a307ecb11da03890b1.

Conflicts:
	tendenci/core/event_logs/models.py
version bump
pull back 2 migrations for event_logs for the sites on latest version already
Revert "version bump"

This reverts commit 3e86fc3a88b9988245c2e3278b1ad573416920a6.
version bump