Fix: quasarframework#1105 - Datatable fix sort lowercase (quasarframework#1106)

* Searching may be case sensitive or insensitive but not forcing us to search in lower case only.

Ref : quasarframework#1105 (comment)

* Fix white space issue

* Remove semi-colon to respect lint standard

* Update table-filter.js

Author: erakis

src/components/table/table-filter.js

@@ -4,8 +4,9 @@ export default {
     filterMethod: {
       type: Function,
       default (rows, terms, cols = this.computedCols, cellValue = this.getCellValue) {
+        const lowerTerms = terms ? terms.toLowerCase() : ''
         return rows.filter(
-          row => cols.some(col => (cellValue(col, row) + '').toLowerCase().indexOf(terms) !== -1)
+          row => cols.some(col => (cellValue(col, row) + '').toLowerCase().indexOf(lowerTerms) !== -1)
         )
       }
     }