fixed ui when horizontal

utils.go

@@ -24,10 +24,12 @@ func RenderLine(frameLine, line_ string, x int, fm *map[int]string, lm *map[int]
 			delete(*fm, i)
 		}
 		if v, ok := (*lm)[i-x]; ok {
+			if i-x > 0 {
 				delete(*lm, i-x)
 				(*lm)[i] = v
 			}
 		}
+	}
 
 	return string(frame)
 }