Make FlexibleSpaceBar title offset more flexible. - #22548

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CLAs look good, thanks!

Hi @showang , I am also looking to implement such change, but as I see, now your PR has a merge issue, can you check it and update it? I didn't notice your PR first so I implemented it myself also, but would make sense if you still plan to go forward, I will close my PR in favor of yours.

First of all: I apologize for how long it's taken to get to this PR. It looks like it's been about 4 months which is a record, but not a good one.

I've moved the change to a new PR: #27623 which accomplishes the same thing in terms of a newtitlePadding parameter. I'm closing this PR in favor of the new one. With any luck the new one will land later this week.

So thank you for the contribution and, again, sorry that it's taken so long to move it along.