TTL block property does not need to set label.
[REFACTOR] Remove adminjs I18n files in Rbs_Event.
[REFACTOR] Remove templateName property from blocks in Rbs_Event (use standard template adding mechanism instead).
Migrate template selection in WebStoreSelector block.
Migrate template selection in menu, siteMap and thread blocks.
Use template parameters to reduce the number of menu templates.
If the execute method returns null, do not apply the fullyQualifiedTemplateName (returning null means to render an empty block).
Minor fixes and clean up.
Update unit tests on thread block.
Merge pull request #1021 from intportg/dev

Migrate template selection in existing blocks.