1.show message when get focus

2.keep error message populated from back end
3.feedback icon's position can't be adjusted by css file when there is no label or it's in input-group
4.for multiple validators, tooltip or popover is destroyed by last NOT_VALIDATED validator

src/js/bootstrapValidator.js

@@ -293,7 +293,7 @@
                 $field.off(events).on(events, function() {
                     that.updateStatus($(this), that.STATUS_NOT_VALIDATED);
                 });
-                //Dorian: show message when get focus
+                //show tooltip or popover message when get focus
                 $field.off("focus.showmsg.bv").on("focus.showmsg.bv", function() {
                     var $icon =$parent.find('.form-control-feedback[data-bv-icon-for="' + field + '"]');
                     if($icon.length>0 && container){
@@ -350,7 +350,7 @@
                     && (!updateAll || i === total - 1))
                 {
                     //$parent.removeClass('has-success').removeClass('has-error').addClass('has-feedback');
-                    //Dorian: keep error message populated from back end
+                    //keep error message populated from back end
                     $parent.addClass('has-feedback');
                     var $icon = $('<i/>')
                                     .css('display', 'none')
@@ -369,17 +369,9 @@
                         }
                     }
 
-                    // The feedback icon does not render correctly if there is no label
-                    // https://github.com/twbs/bootstrap/issues/12873
-                    if ($parent.find('label').length === 0) {
-                        //Dorian: feedback icon's position can't be adjusted when there is no label or it's in input-group
-                        //$icon.css('top', 0);
-                    }
                     // Fix feedback icons in input-group
                     if ($parent.find('.input-group').length !== 0) {
                         $icon.css({
-                            //Dorian: feedback icon's position can't be adjusted when there is no label or it's in input-group
-                            //'top': 0,
                             'z-index': 100
                         }).insertAfter($parent.find('.input-group').eq(0));
                     }
@@ -1021,7 +1013,8 @@
                                     placement: 'top',
                                     title: $allErrors.filter('[data-bv-result="' + that.STATUS_INVALID + '"]').eq(0).html()
                                 })
-                                : $icon.css('cursor', '').tooltip('destroy');
+                                /* multiple validator, tooltip is destroyed by last NOT_VALIDATED validator*/
+                                : $icon.tooltip('hide');
                         break;
                     // ... or popover
                     case ($icon && 'popover' === container):
@@ -1030,12 +1023,11 @@
                                     container: 'body',
                                     content: $allErrors.filter('[data-bv-result="' + that.STATUS_INVALID + '"]').eq(0).html(),
                                     html: true,
-                                    //Dorian:
-                                    container:'body',
                                     placement: 'top',
                                     trigger: 'hover click'
                                 })
-                                : $icon.css('cursor', '').popover('destroy');
+                                /* multiple validator, popover is destroyed by last NOT_VALIDATED validator*/
+                                : $icon.popover('hide');
                         break;
                     default:
                         (status === this.STATUS_INVALID) ? $errors.show() : $errors.hide();