added "No limit" as placeholder text to be more clear NOT to write "e…

…mpty", which forbides (like every non-number) any export

admin/lang/egw_de.lang

@@ -655,6 +655,7 @@ no default account found!	admin	de	Kein Standard Mail-Konto gefunden!
 no encryption	admin	de	Keine Verschlüsselung
 no forwarding email address	admin	de	Keine Weiterleitungsadresse definiert
 no jobs in the database !!!	admin	de	Keine Jobs in der Datenbank!
+no limit	admin	de	Kein Limit
 no login history exists for this user	admin	de	Benutzer hat sich noch nie angemeldet!
 no matches found	admin	de	Keine Übereinstimmungen gefunden
 no message returned.	admin	de	Keine Nachricht zurückgeliefert.

admin/lang/egw_en.lang

@@ -655,6 +655,7 @@ no default account found!	admin	en	No default account found!
 no encryption	admin	en	No encryption
 no forwarding email address	admin	en	No forwarding email address
 no jobs in the database !!!	admin	en	No jobs in the database!
+no limit	admin	en	No limit
 no login history exists for this user	admin	en	No login history exists for this user!
 no matches found	admin	en	No matches found!
 no message returned.	admin	en	No message returned

admin/templates/default/config.xet

@@ -385,7 +385,7 @@
 						<et2-description  value="How many entries should non-admins be able to export (empty = no limit, no = no export)"></et2-description>
 						<et2-description  value="This controls exports and merging."></et2-description>
 					</et2-vbox>
-					<et2-textbox  id="newsettings[export_limit]"></et2-textbox>
+					<et2-textbox  id="newsettings[export_limit]" placeholder="No limit"></et2-textbox>
 				</row>
 				<row>
 					<et2-description  value="Group excepted from above export limit (admins are always excepted)" label="%s:"></et2-description>