i18n: Keep previous configuration

https://github.com/FreshRSS/FreshRSS/issues/1284

app/i18n/de/install.php

@@ -4,7 +4,7 @@ return array(
 	'action' => array(
 		'finish' => 'Installation fertigstellen',
 		'fix_errors_before' => 'Bitte Fehler korrigieren, bevor zum nächsten Schritt gesprungen wird.',
-		'keep_install' => 'Vorherige Installation beibehalten (Daten)',
+		'keep_install' => 'Vorherige Konfiguration beibehalten',
 		'next_step' => 'Zum nächsten Schritt springen',
 		'reinstall' => 'Neuinstallation von FreshRSS',
 	),

app/i18n/en/install.php

@@ -4,7 +4,7 @@ return array(
 	'action' => array(
 		'finish' => 'Complete installation',
 		'fix_errors_before' => 'Please fix errors before skipping to the next step.',
-		'keep_install' => 'Keep previous installation',
+		'keep_install' => 'Keep previous configuration',
 		'next_step' => 'Go to the next step',
 		'reinstall' => 'Reinstall FreshRSS',
 	),