Merge pull request #12167 from jmchilton/backport_11773

        /** try to find a good pair name for the given fwd and rev datasets */

        _guessNameForPair: function (fwd, rev, removeExtensions) {

            removeExtensions = removeExtensions ? removeExtensions : this.removeExtensions;

            var fwdName = fwd.name;

            var revName = rev.name;

            var lcs = this._naiveStartingAndEndingLCS(

                fwdName.replace(new RegExp(this.filters[0]), ""),

                revName.replace(new RegExp(this.filters[1]), "")

            );

            let fwdName = fwd.name;

            let revName = rev.name;

            const fwdNameFilter = fwdName.replace(new RegExp(this.forwardFilter), "");

            const revNameFilter = revName.replace(new RegExp(this.reverseFilter), "");

            let lcs = this._naiveStartingAndEndingLCS(fwdNameFilter, revNameFilter);

            /** remove url prefix if files were uploaded by url */

            var lastSlashIndex = lcs.lastIndexOf("/");

            const lastSlashIndex = lcs.lastIndexOf("/");

            if (lastSlashIndex > 0) {

                var urlprefix = lcs.slice(0, lastSlashIndex + 1);

                const urlprefix = lcs.slice(0, lastSlashIndex + 1);

                lcs = lcs.replace(urlprefix, "");

                fwdName = fwdName.replace(extension, "");

                revName = revName.replace(extension, "");

            }

            if (removeExtensions) {

                var lastDotIndex = lcs.lastIndexOf(".");

                const lastDotIndex = lcs.lastIndexOf(".");

                if (lastDotIndex > 0) {

                    var extension = lcs.slice(lastDotIndex, lcs.length);

                    const extension = lcs.slice(lastDotIndex, lcs.length);

                    lcs = lcs.replace(extension, "");

                    fwdName = fwdName.replace(extension, "");

                    revName = revName.replace(extension, "");