fix (and reworkit a little bit) the Layout Grid

[nicoecheza]

closes decentraland/creator-hub#207

[cloudflare-workers-and-pages]

Deploying js-sdk-toolchain with    Cloudflare Pages

Latest commit:	109ba2a
Status:	✅  Deploy successful!
Preview URL:	https://9f891a82.js-sdk-toolchain.pages.dev
Branch Preview URL:	https://fix-grid.js-sdk-toolchain.pages.dev

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Test this pull request

• The @dcl/sdk package can be tested in scenes by running

  npm install "https://sdk-team-cdn.decentraland.org/@dcl/js-sdk-toolchain/branch/fix/grid/dcl-sdk-7.6.3-11329120333.commit-9555c41.tgz"

• To test with npx init

  export SDK_COMMANDS="https://sdk-team-cdn.decentraland.org/@dcl/js-sdk-toolchain/branch/fix/grid/dcl-sdk-commands-7.6.3-11329120333.commit-9555c41.tgz"
  npx $SDK_COMMANDS init

• The @dcl/inspector package can be tested by visiting this url

  • Or by installing it via NPM

  npm install "https://sdk-team-cdn.decentraland.org/@dcl/js-sdk-toolchain/branch/fix/grid/@dcl/inspector/dcl-inspector-7.6.3-11329120333.commit-9555c41.tgz"

• The /changerealm command to test test in-world

  /changerealm https://sdk-team-cdn.decentraland.org/ipfs/fix/grid-e2e
  

• You can preview this build entering:
  https://playground.decentraland.org/?sdk-branch=fix/grid