Summary:
Whole numbers, when imported from Excel into a Text column show up
without decimals (e.g. "300"), but when imported from Google Sheets show
up with decimals (e.g. "300.0"). The decimals are hard for end-users to
remove. Fix by treating whole numbers consistently as ints.
Test Plan: Added a fixture reproducing the issue, and a test case.
Reviewers: georgegevoian
Reviewed By: georgegevoian
Differential Revision: https://phab.getgrist.com/D3800