Merge pull request #6906 from firefly-iii/fix-clean-string

Add some extra catches and remove debug info

app/Support/Request/ConvertsDataTypes.php

@@ -90,8 +90,9 @@ trait ConvertsDataTypes
         if (null === $string) {
             return null;
         }
-        var_dump($string);
-
+        if('' === $string) {
+            return '';
+        }
         $search  = [
             "\0", // NUL
             "\f", // form feed
@@ -153,6 +154,9 @@ trait ConvertsDataTypes
         if (null === $string) {
             return null;
         }
+        if('' === $string) {
+            return '';
+        }
         return trim($string);
     }