Thank you for your interest in the spreadsheet.
We couldn't replicate the issue at hand in an MVC project. Please, check that you're using the latest version 2016.1.112 as this is the first non-beta release.
If the problem persists we'd appreciate a sample project that we can test with.
The toolbar currently can be disabled entirely. We're working on more fine grained customization.
The formula bar is with a fixed position and can't be hidden in the current version. Same for row/column headers.
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Feedback Portal
and vote to affect the priority of the items