Make the Grid CRM app looks better

[hanastasov]

Steps to reproduce:

1. npm i
2. npm run start:app-crm
3. Observe the sample loaded:

Grid CRM sample does not take the full height of the page and has no padding to borders.

Instead, to look better:

1. Make it take full height
2. Add some padding

In general, should look like how the FinJS Demo look: https://www.infragistics.com/angular-demos-lob/grid-finjs?theme-switch=true

NOTE: To run the FinJS demo from this repo:

1. nom run start:app-lob
2. Go to http://localhost:62936/samples/grid-finjs