[BUGFIX] Fix registration of cliKey

There has been a "^" character added in
rff4a9972cf76377cd845ba33f4adf04fb941fd46 to
the array key "cliKeys" which was not intended.

Change-Id: Ifad08e8d24958a38f8cf0deceb9b6986769d5d18
Resolves: #60170
Reviewed-on: https://review.typo3.org/31487
Reviewed-by: Phuong Doan <phuong.doan@dkd.de>
Tested-by: Phuong Doan <phuong.doan@dkd.de>
Reviewed-by: Sascha Egerer <sascha@sascha-egerer.de>
Tested-by: Sascha Egerer <sascha@sascha-egerer.de>
[BUGFIX] Backend Module calls addFlashMessage which does not work in < 6.2

In the OverviewModuleController $this->addFlashMessage() is called. This
function was implemented in 6.2. That means that this backend module
does not work in TYPO3 6.0 and 6.1.

This patch creates a backport of this function in the AbstractModuleController
that calls the parent function if TYPO3 Version is >= 6.2 and the backported
implementation if TYPO3 Version is < 6.2

Change-Id: I73320d086c8da9c00c9e123ae55d06a0673a578e
Resolves: #60124
Reviewed-on: https://review.typo3.org/31673
Reviewed-by: Phuong Doan <phuong.doan@dkd.de>
Tested-by: Phuong Doan <phuong.doan@dkd.de>
Reviewed-by: Sascha Egerer <sascha@sascha-egerer.de>
Tested-by: Sascha Egerer <sascha@sascha-egerer.de>
[BUGFIX] Do not reference image in fileadmin

For the search button there is an image as button
defined. The path references a file in the fileadmin
folder.

The Button is changed to a simple submit button
which is a better default solution for the template
file.

Resolves: #60260

Change-Id: Idd4f010e1f35d378d0705961fe47304683d57f63
Reviewed-on: https://review.typo3.org/31672
Reviewed-by: Sascha Egerer <sascha@sascha-egerer.de>
Tested-by: Sascha Egerer <sascha@sascha-egerer.de>
[BUGFIX] SolrService::getSynonyms should always return an array

There is an exception thrown when the Synonym backend module is
opened but no synonyms exist in the solr core.

This is caused by the function SolrService::getSynonyms that
should always return an array which is ensured here.

Change-Id: Idda688e1b0d079a746d172268b19c891063d36cd
Resolves: #60432
Reviewed-on: http://review.typo3.org/31701
Reviewed-by: Hans Höchtl <jhoechtl@gmail.com>
Tested-by: Hans Höchtl <jhoechtl@gmail.com>
Copy submit button image from Intro Package

Resolves: #60260

Change-Id: Ief9c3fa7e160c9ad42ea69da2d58a8ca944d33ef