Consolidate Dialog CSS

[arlowhite]

The generated code in #4 has an excessive amount of CSS that isn't shared between components.

At a minimum, we should standardize the dialog title, content, and actions. All of our dialogs should use the same styling. This could be done by modifying the Material theme, or defining a class in global styles.

Notes

Default mat-dialog-content does have an issue: Why is padding needed on dialog content for it not to show the scrollbar? (when there's plenty of room)

Extra

Review the other styles in these UIs and try to extract common styles to the global stylesheet. Standardize typography