Show hidden neighbors' initial placement incorrect

[ugurdogrusoz]

When you hide some map content and try to bring them back (unhide/show) through "Show Hidden Neighbors" context menu, the initial placement of new content should be done relative to the seed node using the layout-utilities extension features. But currently it doesn't look like it's happening.

[ugurdogrusoz]

After investigation:

• We still do not use the layout utilities since that extension is designed to reveal only 1 level of hidden neighbors at a time.
• Current code in Newt to find available space, which the layout utilities is based on, seems to work better than I thought, so we can keep this.