Input issues on macOS when running binary directly instead of .app bundle

**Operating system or device - Godot version:**
Godot 3.0
Mac OS X 10.12

**Issue description:**
Single click no longer functions, seem to be ignored. Double clicks still work though
Was working fine in the build from a few days ago, but stopped working after a fresh build of master yesterday.

**Steps to reproduce:**
Click on something :)
