When creating a widget based on a widget that is available by default in the editor it will not show up in the palette once the editor has been closed until the widget itself has been opened during that editor session.

Steps to Reproduce
  1. Download the attached project
  2. Open the project
  3. Open the widget "Interface"
  4. Open "ForgetfulButton"
  5. Search the palette for "ForgetfulButton" (it should be in the common section)
  6. Close the editor
  7. Reopen the editor
  8. Open the widget "Interface" (do NOT open "ForgetfulButton" first)
  9. Search the palette for "ForgetfulButton"

Result: The widget that was created does not show up in the palette if the editor has been restarted (until the widget has been opened)
Expected: The widget would show up in the palette

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ComponentTools - UMG
Affects Versions4.19.2
Target Fix4.21
Fix Commit4284541
Main Commit4329255
Release Commit4399518
CreatedMay 15, 2018
ResolvedAug 14, 2018
UpdatedOct 2, 2018