Fixes ProjectTypeSelection in app preferences

[AWolf81]

Summary: As mentioned by @mathieudutour Next.js was missing in the app-settings modal because we haven't consistently used the ProjectTypeSelection component.

The PR is adding Next.js to the ProjectTypeSelection component and also uses it in MainPane for project creation. Also the missing Summary copy for Next.js is added.

Screenshots/GIFs: Summary copy App preferences

[codecov[bot]]

Codecov Report

Merging #325 into master will decrease coverage by <.01%. The diff coverage is 0%.

@@            Coverage Diff             @@
##           master     #325      +/-   ##
==========================================
- Coverage   20.75%   20.74%   -0.01%     
==========================================
  Files         247      247              
  Lines        3903     3904       +1     
  Branches      391      391              
==========================================
  Hits          810      810              
- Misses       2812     2813       +1     
  Partials      281      281

Impacted Files	Coverage Δ
src/components/CreateNewProjectWizard/MainPane.js	0% <0%> (ø)	:arrow_up:
...c/components/CreateNewProjectWizard/SummaryPane.js	0% <0%> (ø)	:arrow_up:
...rc/components/AppSettingsModal/AppSettingsModal.js	0% <0%> (ø)	:arrow_up:
...nents/ProjectTypeSelection/ProjectTypeSelection.js	0% <0%> (ø)	:arrow_up: