Fix fixed target display intervals additional delay bug

[lkeegan]

• repeat of condition with fixed target display intervals now continues the same fixed intervals
  • previously the time from the last target of the previous trial was not taken into account
  • this meant the first target of each repeat had a longer delay than desired
• store the time used by most recent target for current / previous trial in TaskManager to allow this
• extend test_task_fixed_intervals_no_user_input to include this case in tests
• bump version to 1.3.2
• update changelog
• resolves #256

[sonarcloud[bot]]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (96270c0) 90.01% compared to head (e16f68b) 90.03%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #257 +/- ## ========================================== + Coverage 90.01% 90.03% +0.02% ========================================== Files 19 19 Lines 1602 1606 +4 ========================================== + Hits 1442 1446 +4 Misses 160 160 ```

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