Fix examples

[texodus]

• Adds a default title of the template "// New Column ${N}" when a new expression editor is opened.
• Fixes scrollbars to be more similar to 0.10.3, applying ::-webkit-*
• Fix material theme to work correctly work when differently themed <perspective-viewer> elements are on the same page.
• Fix example projects to use 1.0.0 API.
• Fix a long-flapping test related to monaco asynchronous expression validation.
• Set @finos/perspective-viewer package to use an inline build by default, as users are still reporting webpack issues galore.