fix: update variable declarations and cache handling

This commit involves refactoring code in Products.js by updating 'var' to 'let' or 'const' for proper scoping and better readability. It also introduces a new variable 'inAdministration' to handle specific conditions for QUIQQER's administrative state and modifies the condition for using cached data, considering 'inAdministration'. Expect no changes in functionality or behavior of the software with these changes.

merged

mentioned in commit 7a66d570

This MR is included in version 2.5.4

The release is available on GitLab release.

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