Update launcher/runner component to new models ...

- Fix game arguments being missing from version manifest due to new format
- Update Runner to use more substitutions & support new argument model
- Move loader/installer libraries to their own section to avoid runtime conflicts
- Implement some basic feature matching for arguments

Fix .url.txt not working if building from within creator tools.

Load UI assets in the background.

[Creator] Add mod update checker.

[Creator] Add Pack.getModsDir().

[Creator] Make feature table searchable.

[Creator] Update about dialog license information.

[Creator] Make tables searchable.

[Creator] Show progress dialog when loading the pack manager too.

Make the workspace frame load more responsively.

[Creator] Don't open output directory after building a modpack.

[Creator] Reduce added menu padding a little.

[Creator] Add some stylistic changes to the pack manager frame.

[Creator] Add "Open Workspace Folder" option.

[Creator] Don't re-download mods using a download URL every time.

[Creator] Add menu options to open the test data folders.

Fix some native compatibility issues.

[Creator] Use bigger pack icon.

[Creator] Fix incorrect launcher config dir.

[Creator] Use own pack icon.

[Creator] Add test online option.

Make the PHP package listing file use old array syntax.

Add new creator tools.