Fix tooltips not closing when the pointer leaves the window

[TomEdwardsEnscape]

Fixes a mistake I made in #14928. If a tooltip is open and the pointer leaves the window without first leaving the tooltip control, the tooltip does not close. The easiest way to replicate this is to create a control which fills the entire window (with no margin) and give it a tooltip.

This PR will conflict with #15259. I still submitted this fix separately because #15259 includes a change in behaviour, and it's not clear whether it will be added to 11.1.

Breaking changes

None

Obsoletions / Deprecations

None

[avaloniaui-bot]

You can test this PR using the following package version. 11.2.999-cibuild0047154-alpha. (feed url: https://nuget-feed-all.avaloniaui.net/v3/index.json) [PRBUILDID]

[maxkatz6]

@TomEdwardsEnscape I will push the other PR to 11.1, so it can be part of 11.1 version behavioral changes. This way it would be better than waiting for 11.2/12.0 or even worse in 11.1.1.

[TomEdwardsEnscape]

Sometimes on MS Windows we receive a window exit event when a tooltip opens, but before the pointer has been detected over the tooltip. This causes the tooltip to incorrectly close.

This seems to be an upstream issue, probably related to #13036, and I don't think that anything can or should be done about it in ToolTipService.

[maxkatz6]

Some tests are failing

[TomEdwardsEnscape]

I don't currently have time to work on this, if it needs to be done soon then please can someone else take over.

[avaloniaui-bot]

You can test this PR using the following package version. 11.2.999-cibuild0047906-alpha. (feed url: https://nuget-feed-all.avaloniaui.net/v3/index.json) [PRBUILDID]

[cla-avalonia]

• All contributors have signed the CLA.

[TomEdwardsEnscape]

@cla-avalonia agree

[TomEdwardsEnscape]

The Windows integration tests failed, but the failures seem unrelated to this PR's changes.

[maxkatz6]

These specific tests were fixed in master, need to merge/rebase.

[avaloniaui-bot]

You can test this PR using the following package version. 11.2.999-cibuild0048016-alpha. (feed url: https://nuget-feed-all.avaloniaui.net/v3/index.json) [PRBUILDID]