Sequencer new option to open sequence config file when initialised using initSeqConfig

Sequences with exit in step_config, changed to return to support opening config file on first run

seqs/matrix.sh

@@ -542,8 +542,8 @@ toolScript() {
 adminTokenCheck() {
   if [ -z "$MATRIX_ACCESS" ] ; then
     [ $QUIET -eq 0 ] && read -s -p "Please enter admin access tocken: " MATRIX_ACCESS
-    # return -1 if it is still empty
-    [ -z "$MATRIX_ACCESS" ] && return -1
+    # return 1 if it is still empty
+    [ -z "$MATRIX_ACCESS" ] && return 1
   fi
   return 0
 }