[BZ 1127654] - Patternfly theme: various minor UI issues - fixing typo in image name (_over -> _Over); increasing the size of icons for availability; decreasing the size of icons for event severities; removing unused images

(cherry picked from commit c4eba02703bf7380728b50b5ac5355824a77eb75)
Signed-off-by: Jirka Kremser <jkremser@redhat.com>
[BZ 1127654] - Patternfly theme: various minor UI issues - simple bash script for lightening all the black icons

(cherry picked from commit fb8d00129c25f4c23e3d122b90e4ef3e6c4f5e31)
Signed-off-by: Jirka Kremser <jkremser@redhat.com>
[BZ 1127654] - Patternfly theme: various minor UI issues - lightening all the black icons

(cherry picked from commit c6555a30fc62ff787555f6701e8c7e5b29e8382d)
Signed-off-by: Jirka Kremser <jkremser@redhat.com>
[BZ 1127654] - Patternfly theme: various minor UI issues - better icons for storage node, plugin and refresh

(cherry picked from commit bc1ea3a3e2ca20ecc3949278a7f0700538532d00)
Signed-off-by: Jirka Kremser <jkremser@redhat.com>
[BZ 1127654] - Patternfly theme: various minor UI issues - invisible scrollbars are not invisible anymore, font color

(cherry picked from commit 513268503fee76395e2ade9b13b91e563a45ae1e)
Signed-off-by: Jirka Kremser <jkremser@redhat.com>
[BZ 1127654] - Patternfly theme: various minor UI issues - fixing the relative paths to the images from patternfly-custom.css

(cherry picked from commit 1431face6b4dd140d1f7473db3dc5b9b1a42a865)
Signed-off-by: Jirka Kremser <jkremser@redhat.com>

Conflicts:
	modules/enterprise/gui/coregui/src/main/webapp/login