Improve PropertyFilter doc

[glebfox]

Existing page: https://docs.jmix.io/jmix/flow-ui/vc/components/propertyFilter.html

1. Add example + screenshot for operationEditable="true", e.g. Ui Samples
2. Add example + screenshot for custom field, e.g.

<propertyFilter id="nameFilter"
                dataLoader="clientsDl" property="name"
                operation="CONTAINS"
                labelVisible="false"
                width="100%" maxWidth="30em">
    <textField id="nameFilterField"
               placeholder="Fiend a client..."
               clearButtonVisible="true">
        <prefix>
            <icon icon="SEARCH"/>
        </prefix>
    </textField>
</propertyFilter>

3. Add description for support of KeyValueCollectionContainer, e.g. Ui Samples and classic doc
4. Mention that PropertyFilter works with Dynamic Attributes (see classic doc)
5. Add css, ariaLabel, ariaLabelBy, focusShortcut common attributes
6. Remove requiredIndicatorVisible