Properly add <wbr> tags to the left (site) menu and the central content list items

[sanex3339]

Problem

Right now, the typedoc adds <wbr> tags to the menu items of the right (page) menu.
But the left (site) menu and content menu items don't have <wbr> tags added, it causes scroll bars on narrow screen width.
It can be solved via a customjs logic, but this is far from ideal.

It would be nice to have native support for <wbr> tags for the mentioned lists

Suggested Solution

Add tags to the left (site) menu and the central content list items.

The images below show how the left and content menus would look after the <wbr> tags are added to items.

[Gerrit0]

PR welcome, this would have to be done in the JS that builds the navigation on the client side:

https://github.com/TypeStrong/typedoc/blob/master/src/lib/output/themes/default/assets/typedoc/Navigation.ts#L113

It will need a version of the wbr helper implemented which works on regular strings rather than with JSX elements:

https://github.com/TypeStrong/typedoc/blob/master/src/lib/output/themes/lib.tsx#L43-L64