fix: Make dynamic value change consistent

[marek-mihok]

The PR fulfills these requirements: (check all that apply)

• It's submitted to the main branch.
• When resolving a specific issue, it's referenced in the PR's title (e.g. feat: Add a button #xxx, where "xxx" is the issue number).
• When resolving a specific issue, the PR description includes Closes #xxx, where "xxx" is the issue number.
• If changes were made to ui folder, unit tests (make test) still pass.
• New/updated tests are included

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This PR addresses all issues found after final revision of #1154. Included issues are:

• Checklist - set values to None, select value manually, set values to None once again (unable to set to None)
• Tabs - dynamic value change is fully supported for ui.tab_card only, but not for ui.tabs - try to set value dynamically, select tab manually, set value dynamically to the same value as before (Tab is not switching)
• Combobox single/multi - when choices are set to None it leads to endless loop
• Dropdown - dialog single/multi - when choices are set to None it leads to endless loop
• Nav - user was unable to dynamically unselect all items by specifying value=None within the Wave app when component was initially rendered with some value

Also this PR adjusts the behavior of Nav/Tab/Tabs in following manner:

• Revert behavior for Menu - when value is set to None, no item is active
• Keep behavior for Tab/Tabs - when value is set to None, first item is active by default - we are not bringing support for Allow for no selected tab in tabs group #1776
• Args setting is consistent

Closes #1154
Closes #1776

[mturoci]

Thanks @marek-mihok!