ISTWCMS-6641: add icons for multipurpose list blocks

images/layout_builder_browser/list-manual.svg

+<svg xmlns="http://www.w3.org/2000/svg" width="30" height="30" viewBox="0 0 30 30"><defs><style>.background{fill:#85bef4;}.extra{fill:#666;}</style></defs><rect class="background" x=".5" y=".5" width="29" height="29"/><path d="m29,1v28H1V1h28m1-1H0v30h30V0h0Z"/><rect x="11.13" y="22.5" width="13.99" height="3" rx=".75" ry=".75"/><rect x="11.13" y="16.51" width="13.99" height="3" rx=".75" ry=".75"/><circle cx="7.13" cy="18.01" r="2.25"/><circle cx="7.13" cy="24" r="2.25"/><path d="m8.96,9.93l-2.5,2.36-1.55-2.61,3.31-.99-3.31-.99,1.55-2.61,2.5,2.36-.79-3.33h2.96l-.79,3.33,2.5-2.36,1.55,2.61-3.31.99,3.31.99-1.55,2.61-2.5-2.36.79,3.33h-2.96l.79-3.33Z"/><path class="extra" d="m18.08,11.42c0,.86,1.11.93,1.61.93.13,0,.23.1.23.23v.77c0,.13-.1.23-.23.23-.68,0-1.51-.01-2.23-.73-.74.73-1.61.74-2.23.73-.13,0-.23-.1-.23-.23v-.77c0-.13.1-.23.23-.23h0c.54,0,1.62-.06,1.62-.92v-5.54c0-.86-1.11-.94-1.61-.93-.13,0-.23-.1-.23-.23,0,0,0,0,0,0v-.77c0-.13.1-.23.23-.23.68,0,1.51.01,2.23.73.74-.73,1.61-.74,2.23-.73.13,0,.23.1.23.23v.77c0,.13-.1.23-.23.23-.54,0-1.62.06-1.62.93v5.54Z"/></svg>

images/layout_builder_browser/list.svg

+<svg xmlns="http://www.w3.org/2000/svg" width="30" height="30" viewBox="0 0 30 30"><defs><style>.background{fill:#85bef4;}</style></defs><rect class="background" x=".5" y=".5" width="29" height="29"/><path d="m29,1v28H1V1h28m1-1H0v30h30V0h0Z"/><rect x="11.13" y="22.5" width="13.99" height="3" rx=".75" ry=".75"/><rect x="11.13" y="16.51" width="13.99" height="3" rx=".75" ry=".75"/><circle cx="7.13" cy="18.01" r="2.25"/><circle cx="7.13" cy="24" r="2.25"/><path d="m8.96,9.93l-2.5,2.36-1.55-2.61,3.31-.99-3.31-.99,1.55-2.61,2.5,2.36-.79-3.33h2.96l-.79,3.33,2.5-2.36,1.55,2.61-3.31.99,3.31.99-1.55,2.61-2.5-2.36.79,3.33h-2.96l.79-3.33Z"/></svg>