[Core] Use correct configuration selector.

Currently, when building a specific project within a solution using the command line, the ItemConfigurationSelector is used, resulting in referenced projects using the projects configuration rather than the configuration specified by the solution.

This changes the behavior of the command line to match the behavior within the IDE.
Implemented 'Bug 12604 - Add possibility to override/implement
inherited constructors'.
Fixed 'Bug 13335 - Intellisense window becomes too big and goes off
screen'.
Fixed 'Bug 14479 - Completion window popups under top Mac bar'.
Bump nrefactory/fixed IkvmLoader bug.
Fixed 'Bug 14853 - "Missing interface members" firing when using interface inheritance'.
Fixed 'Bug 14849 - Name should have suffix EventArgs'.
Bump nrefactory/optimized IKVM loader.
Bump nrefactory.
[CorDebug] Fix FieldReference Flags.
[CorDebug] What did I just type?
Bump nrefactory/fix tests.
Bump nrefactory/fixed interning.
Bump nrefactory.
Revert "[Ide] Call NSApplication.Terminate when exiting. Fixes #14789"

This reverts commit 50f0535c00ced37d017f1af2e57c342b080b2c36.
Bump nrefactory.
[CSharpBinding] Fixed null reference exception.
[CorDebug] Rename CorBacktrace and mirror some more API.
[Ide] Fixed lazy pad initialization.
Bump nrefactory.