WI-17883
extra checks for correct writability
performance, cleanup
sometimes JBColor.DARK is not up to date
(cherry picked from commit ec56a84a7ac1f72f6bda5e9ec2c3d18106d3010a)
IDEA-98461 todo's not visible in right gutter
(cherry picked from commit 18a692f49fa336d0a9426b49bf7052be12d443e9)
IDEA-103549 "Go To Action/Settings": mnemonic results in space of option name (?)
(cherry picked from commit 80577083dc413b6444384fb4f434463cbc96d705)
IDEA-93568 Darcula - Number steppers look terrible
(cherry picked from commit 38294515cf00ca19593391a878c62da5eb6767af)
IDEA-104442 Darcula: <li> bullet in inspection description is black
(cherry picked from commit 44150690b437dd8db56bf3b333991e5911da8dc6)
javadocs
IDEA-105078 Import project from existing sources: library detection doesn't work [jeka]
upgraded Snappy to 1.1.0 M3 to fix problem with AMD64 library does not work at some Linux distributions