In the vue native grid, the inputs rendered in the filter row don't have a title or accessible name. This would make it nearly impossible for someone using a screen reader to understand what each field means. In order to comply with WCAG 4.1.2 (Name, Role, Value) please add a title and/or aria-label/labelledby attribute to these inputs. 

The jquery grid has the aria-label and title populated with the column name. I think it'd be even more useful if the label said "Filter by {columnName}".

Describe the bug
Locked and resized columns leave a small gap between the columns when scrolling is performed

To Reproduce
Steps to reproduce the behavior:
https://stackblitz.com/edit/mzxqs7-hy29kw?file=src%2Fmain.vue
lock both first and the second column from the column menu
resize the first column
scroll the columns

Curent -
A tiny gap is visible between the first and the second column

Add active class to the column menu icon once something in it is different from default

Currently we recommend using custom class on the header(https://www.telerik.com/kendo-vue-ui/components/grid/columns/column-menu/#toc-styling-the-column-menu-icon), yet not visualising that the menu is populated seems like a UI misleading issue when using the component so we should add it by default