Clicking to purchase a tile works inconsistently

When I click a city and bring up the city view, I see the purchasable tiles, but actually purchasing them can be a bit of a challenge at times. It seems to take 2 clicks on average, sometimes 3-5 clicks, sometimes 1.

- OS: Windows 10
- Version: 1.0.0.290
- Expansions: All expansions and DLC, including Rise & Fall, and Gathering Storm
- Other mods: None

I seem to recall this issue being present in CQUI before Gathering Storm, I just shrugged it off as my misclicking. Vanilla is buttery smooth in comparison.

Related to [#216](https://github.com/Azurency/CQUI_Community-Edition/pull/216)?

Reproduce the inconsistent tile-purchase clicks in the city view on the reported Windows 10 and Civilization VI setup. Read the discussion and related pull request #216 first, then trace the city-view tile interaction to identify why clicks are missed. Done means purchasable tiles respond reliably on the first click without regressing other city-view interactions.

Written by the indexing model from the issue text.