html5 2.3 updates

[Antoine Martin]

Follow up from #1581

TODO:

• notification actions as per ticket:1735#comment:4
• top bar menu

[Antoine Martin]

Link to commit log: log/xpra/trunk/src/html5.

• r17697: ensure the server sends BGR(A) input to the webp encoder (we can't swap channels with the HTML5 client)
• r17768: javascript debugging, see #1685

[Antoine Martin]

• r18080 adds a top bar where we dock system tray icons.
• r18206 smarter window placement, add space at the top for the top-bar
• r18084 fix painting of windows with transparency (backported in r18085)

Still TODO:

• hide the top bar by default, add a connect page option to show it
• add arrow handles to show and hide it
• automatically show it when a new tray icon gets docked, automatically hide it when the last one is removed?
• add configuration menus, just like the other clients
• "default" icons would be nice to have, see r18191

[Antoine Martin]

Updates:

• r18458 focus fix (backported)
• r18626 + r18647: use relative urls
• r18631: audio codec fix (backported)
• r18649: ssl option, hide "insecure" passwords

[Antoine Martin]

Updates:

• minor tweaks: r18724, r18734
• allow pathname to be specified: r18725 + r18739, useful when using a proxy, see wiki/Nginx
• top bar, see #1471
• handle switching tabs and back: r18733
• better pointer position handling: r18766 (prevents it from lingering on the last window position)

[Antoine Martin]

Will follow up in #1788.

[Antoine Martin]

Mostly a FYI. You must be handling the tab switching refresh rate management already, right? Some of the other items are worth a look too.

[Antoine Martin]

Updates:

• fixups: r18919, r18984, r18985
• r18920: precise wheel support #1797
• r18987: notification reference leak with timeouts
• r19073: horizontal button remapping

[Antoine Martin]

Follow up for 2.4: #1788

[migration script]

this ticket has been moved to: ​https://github.com/Xpra-org/xpra/issues/1670