= improved support of .sbtopts

Supported options:
    -no-share, -no-global, -sbt-boot, -sbt-dir, -ivy, -jvm-debug,
    all options with -D and -J prefixes

Unsupported options:
    -S prefix seems to be unsupported by sbt-launcher itself
    -mem has a bit untrivial algorithm, same thing can be achieved
        by configuring -Xmx, -Xms, -XX:ReservedCodeCacheSize options
    -sbt-version, -sbt-rc, -sbt-snapshot, -sbt-jar
        and -java-home are overriden by IDEA options

Other options have no impact on project importing process

(cherry picked from commit e1c2851737f99919ffce6f95be470072d7889b0f)