fixes #4340 - 1.5 fix: Unassigned hosts outside stats box

Decided for auto instead since hidden could potentially clip content. Auto
will add a scrollbar if need be but should never happen since we only
define the min-height.
fixes #6855 - bump safemode gem version

(cherry picked from commit 00b12263ea0e2d222cf55931329c6ee5fa0e3d07)
fixes #5119 - ensure GCE can list images.

(cherry picked from commit 70b5b765853bbaba86278d5607fdb31b2f66224a)
fixes #7035 - expand column name for Rails 3.2.8 compat in Puppet class search

(cherry picked from commit f06b276b93f9ff47ca66174c606fee6fc2c64321)
Fixes #6830 - Add host search on compute_resource_id used in 1.5 auth migrations

(cherry picked from commit 48c69213e70e1bc697b4a5487652549a8757a7a0)
Release 1.5.3