Remove refresh-all from care-for-return

reimplement fill-up and cat

scheme/input-fields.scm

@@ -403,7 +403,6 @@
       ((#f) ;; konnte nichts machen
        (values #t #f))
       ((#t) ;; etwas zugefügt oder entfernt
-       (refresh-all input-field)
        (values #t #t))
       (else 
        (values #t #f)))))
@@ -819,7 +818,7 @@
 						       y-edit-pos)
 						 (list 
 						  (append
-						   (reverse (cdr (reverse current-line)))
+						   (drop-right current-line 1)
 						   (list-ref edit-lines
 							     (+ y-edit-pos 1))))
 						 (drop edit-lines
@@ -1542,35 +1541,15 @@
 
 (define fill-up
   (lambda (lst len elem)
-    (append lst 
-	    (let loop ((n (- len
-			     (length lst))))
-	      (if (< n 0)
-		  '() ;'error--fill-up
-		  (if (zero? n)
-		      '()
-		      (cons elem
-			    (loop (- n 1)))))))))
+    (let* ((lst-len (length lst))
+           (needed (- len lst-len)))
+      (if (= needed 0)
+          lst
+          (append lst (make-list needed elem))))))
 
 (define cat
   (lambda (lst-lst)
-    (if (null? lst-lst)
-	'()
-	(append (car lst-lst)
-		(cat (cdr lst-lst))))))
-
-(define split
-  (lambda (lst n)
-    (let loop ((fst '())
-	       (scnd lst)
-	       (n n))
-      (if (or (null? scnd)
-	      (zero? n))
-	  (values (reverse fst) scnd)
-	  (loop (cons (car scnd)
-		      fst)
-		(cdr scnd)
-		(- n 1))))))
+    (apply append lst-lst)))
 
 (define remove
   (lambda (lst pos)