add context reaction blocks export to all 4 presets #3695

#3695

Exports the same context reaction blocks across the 4 "HWP" presets:

* HWP Academic
* HWP Administrative
* HWP Project
* HWP Lab/Research Group

### Changes

#### In "All Sections" Layout

1. The default "Site Logo" widget should be removed by default
1. The default "Site Search" widget should be in the header third region, not sidebar second
1. The default "Shield" widget should be removed by default

#### In "Front" layout

1. The default "Bio Teaser should be removed by default

### QA todo

1. Run `drush fr os vsite_preset`
1. Create a new site at site/register using all 4 new presets
1. On each new site, check the above layout description is correct