Update input group styles for BS4 beta3 fixes #1157 fixes #1158

CHANGE.md

@@ -5,6 +5,7 @@ Change Log: `bootstrap-fileinput`
 
 **Date:** _work in progress_
 
+- (enh #1157, #1158): Update input group styles for BS4 beta3.
 - (bug #1152): Correct preview thumbs stacking post sorting and/or ajax deletion.
 - (enh #1149): Enhance download button behavior to allow Firefox browser to download.
 - (enh #1143): Correct translation path in docs.

js/fileinput.js

@@ -575,11 +575,6 @@
                 self.$caption.attr('placeholder', self.msgPlaceholder.replace('{files}', f));
             }
             self.$captionIcon = self.$captionContainer.find('.file-caption-icon');
-            if (self.mainClass.indexOf('input-group-lg') > -1) {
-                $h.addCss(self.$captionIcon, 'icon-lg');
-            } else {
-                self.$captionIcon.removeClass('icon-lg');
-            }
             self.$previewContainer = $h.getElement(options, 'elPreviewContainer', $cont.find('.file-preview'));
             self.$preview = $h.getElement(options, 'elPreviewImage', $cont.find('.file-preview-thumbnails'));
             self.$previewStatus = $h.getElement(options, 'elPreviewStatus', $cont.find('.file-preview-status'));
@@ -617,7 +612,7 @@
                 '<div class="kv-upload-progress kv-hidden"></div><div class="clearfix"></div>\n' +
                 '<div class="input-group {class}">\n' +
                 '  {caption}\n' +
-                '<div class="input-group-btn">\n' +
+                '<div class="input-group-btn input-group-append">\n' +
                 '      {remove}\n' +
                 '      {cancel}\n' +
                 '      {upload}\n' +