[extension-web-app] Use generic WebStorage implementation

[github-actions[bot]]

Qodana for JVM

3 new problems were found

Inspection name	Severity	Problems
Incorrect constructor injection in XML Spring bean	🔴 Failure	3

💡 Qodana analysis was run in the pull request mode: only the changed files were checked ☁️ View the detailed Qodana report

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[codecov[bot]]

Codecov Report

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

Project coverage is 97.51%. Comparing base (2c59e88) to head (2a23b1d). Report is 1 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #5257 +/- ## ========================================= Coverage 97.50% 97.51% + Complexity 6935 6926 -9 ========================================= Files 957 956 -1 Lines 20108 20096 -12 Branches 1322 1322 ========================================= - Hits 19607 19596 -11 + Misses 393 392 -1 Partials 108 108 ```

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[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud