Release v1.0.508

Release version v1.0.508

Metacello new
    baseline: 'GToolkitForPharo9';
    repository: 'github://feenkcom/gtoolkit:v1.0.508/src';
    load

All commits (including upstream repositories) since last build:
https://github.com/feenkcom/lepiter/commit/254d91 by Tudor Girba
register the right value in the evaluation attribute to get the proper inspector preview feenkcom/gtoolkit#3096

https://github.com/feenkcom/lepiter/commit/c4d327 by Tudor Girba
clicking on the evaluation attribute spawns the result to the right feenkcom/gtoolkit#3096