Research progress bar future progress should not take the full height of the bar

**What do you want to see?**
In the research progress bar, the dimmed segments for future turns' expected progress should not take the full height of the bar.

**How would it help players?**
Better distinguish completed progress from expected progress

**Alternatives**
More distinguishable colors? Maybe each turn should be more "indented" than the last?

**Screenshots and mockups**

**Things to consider**
???

**Related issues**
#500