Schema Search: Fixed Sort issue and Improved UI

[patelriki13]

Schema Search:

• Added default sort on Name Ascending
• Fixed lost sort state after search/filter
• Improved Grid Splitter design
• Improved vertical space on UI screen

[akarzazi]

Hi Rikin Thanks once again for the contribution. Please split the design and "keep sorting" in different pull requests.

For the sorting issue, try to handle the full scope as multi column sorting. you may acheive this in a better way as : https://stackoverflow.com/questions/34947183/remember-wpf-datagrid-sort-order

Instead of subclassing datagrid, you may want to try using an attached behavior http://wpfthoughts.blogspot.com/2019/06/wpf-mvvm-attached-behaviors.html

For the design part, please avoid using colors and borders as much as possible. For a better UI consistency, you may want to try using styles when appropriated to allow a global styling.