Rebase 1.x to 1.4.5 #152
Description
Feature proposal
Now that we have version 2.x on master for Vaadin 24-25, we should rebase 1.x to https://github.com/FlowingCode/GridHelpers/tree/grid-helpers-1.4.5 (since later changes are all "for compatibility with Vaadin 25" and don't have place into such branch)
Describe solution expectations
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Additional information
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