IDEA-128849 Plugin downloader can't handle HTTP redirect

Ensure that we use progress indicator
cleanup
testdata for IDEA-127767
new inference: do not cache control flow during conflict resolution (IDEA-130226)
IDEA-130928 "Quick Documentation" eliminates comma for field
IDEA-130875 Settings: misaligned elements in Copyright Profiles
decompiler: move generated lines as it is stated in debug line table (disabled for now)
check method name when searching for debugger position in compiled class