Fix compatibility with Symfony 4.3

[albingi]

The block name change from panelContent to panel

[bocharsky-bw]

Hey @albingi thank you for fixing it! Btw, do you have any reference to this change? Actually, it might be a possible BC break for those who are not on Symfony 4.3, so probably we should workaround this in some way

[albingi]

Yes, this is about this commit :
symfony/web-profiler-bundle@a92e0ba#diff-3e3f9f89f28a037c50c1714c5a21b3c4

[Nyholm]

@NullIsNot0 Could you review this?

[fsoedjede]

I've tested and this change fix the issue

[bocharsky-bw]

@Nyholm FYI I suppose only you can merge PRs in php-translation organization if tests are broken. Other core members can just merge PRs if at least one core member approved it (except the author of PR) and when tests passed. As you can see, all the tests are broken lately, so I opened #313 to fix them. Would be good to have your review on it

[NullIsNot0]

I confirm, that changes work for Symfony 4.3

[Nyholm]

Thank you for the reviews and for the fix