Changes in 20201011093320

Built from 725180017480c46f17faddc71ee35dcca39db109

..index..
Bug 1632351 R[Core:CSS Parsing and Computation]Enable CSS conic-gradient by default and let it ride the trains
Bug 1669625 R[Core:Graphics: WebRender]Lots of picture cache invalidations with desktop zooming scrollbars enabled + certain DPI ratios
Bug 1670265 R[Core:JavaScript Engine]Remove no longer used Unicode reverse case folding and same upper-case tables
Bug 1669181 A[Core:JavaScript Engine: JIT]Clean-up jit headers
Bug 1670003 R[Core:Panning and Zooming]Add telemetry probes for scrolling speed experiment
Bug 1670343 N[Core:Panning and Zooming]add a few weak frame checks after bug 1651332
Bug 1656727 R[Core:Widget: Gtk]Crash in [@ mozilla::widget::WindowSurfaceWayland::DelayedCommitHandler]
Bug 1668265 R[DevTools:Inspector: Highlighters]Highlighter breaks while refreshing page
Bug 1668939 R[Firefox:Address Bar]Make tab-to-search origin autofill comparison more lenient to match ebay (and other engines with similar behavior)
Bug 1666575 R[Firefox:PDF Viewer]Searching for terms in large PDFs doesn't find all results
Bug 1669756 R[Firefox:Search]Minor improvements to the Add Engine dialog in about:preferences
Bug 1650580 R[Firefox:Theme]Bookmarks Menu uses incorrect arrow icons
Bug 1670170 R[Firefox Build System:General]Remove setting strip flag in js/src/old-configure.in
Bug 1651538 R[Firefox Build System:Task Configuration]Relabel docker images with the prefix "docker-image" instead of "build-docker-image"
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Changes to 14 bugs - 12 fixed.