How to reproduce:
1. Open attached project "case_1019123-BugReport"
2. Open Animation window and select "TestObject" in Hierarchy window
3. Click Add Property and expand Test Script

Expected result: nested integers are all visible and can be animated
Actual result: nested struct integers are only visible if parent class has a variable with the same name, while nested struct floats are visible with or without a variable with same name.

Reproduced with: 2017.3.2f1, 2017.4.1f1, 2018.1.0b13, 2018.2.0a7
Cannot reproduce with 2017.1 and 2017.2 because integer support for Animation window was introduced in 2017.3.0f3