[BUGFIX] Change submit button label to language file entry

The submit button in configure extension form was hardcoded in
template file. This patch moves it to the language file and makes
use of the translate viewhelper.

Fixes: #41276
Releases: 6.0

Change-Id: I230e4eb350a4fe9eaa87ee4d225e6752c1c1df17
Reviewed-on: http://review.typo3.org/15224
Reviewed-by: Helmut Hummel
Tested-by: Helmut Hummel

typo3/sysext/extensionmanager/Resources/Private/Language/locallang.xlf

@@ -51,6 +51,9 @@
 			<trans-unit id="extConfTemplate.backToList" xml:space="preserve">
 				<source>Back to list</source>
 			</trans-unit>
+			<trans-unit id="extConfTemplate.submitButton" xml:space="preserve">
+				<source>Submit</source>
+			</trans-unit>
 		</body>
 	</file>
 </xliff>

typo3/sysext/extensionmanager/Resources/Private/Templates/Configuration/ShowConfigurationForm.html

@@ -41,7 +41,7 @@
 										<span class="info">(<f:translate key="extConfTemplate.type.{item.type}" />)</span>
 									</div>
 								</f:for>
-								<f:form.submit value="Absenden" />
+								<f:form.submit value="{f:translate(key:'extConfTemplate.submitButton')}" />
 							</f:form>
 						</div>
 					</f:for>