Schema: Minor UX Enhancements and Bug Fixes

[zcolah]

• [x] Create Model Modal - Enter Key should trigger Create Model Button
• [x] Add Field Modal - Make Tooltip Text appear on the right of the info icon instead of on top
• [x] Add Field Tooltip Styling has multiple issues
• [x] Rename Integer Field Type to Number Field Type
• [x] https://github.com/zesty-io/manager-ui/issues/2574
• [x] Make correction to the description of Default Value field in the Rules Tab. See screenshot.
• [ ] https://github.com/zesty-io/manager-ui/issues/2580