EGit 3.7 New and Noteworthy

# EGit

## Features

- Enable using staging view for submodule repositories
- Double click on conflicting files in staging view opens the merge tool instead of compare view
- Consider URLs with and without ".git" when importing project sets
- Handle external files in CommitUI.getSelectedFiles()

### GitHub Connector

- No new features

## Usability Improvements

- "Updating index" should indicate that view is "busy"
- "Refresh" operation should indicate that view is "busy"
- Case insensitive order of remotes in push branch dialog
- Transparent icons in push branch dialog
- Make EGit Eclipse welcome page more consistent with other team providers
- Automatically configure gerrit for projects cloned from a Gerrit server

## Performance Improvements

- Scalability: don't run incremental update if there are too many changes
- Scalability: label decorator should cache computed repository branch state. This heavily speeds up resource decoration for large repositories
- Fixed many UI freezes reported via Mars automated error reporting (see issue list).

## Release Engineering and Build

- Update build to Tycho 0.22
- Use target platform DSL and generator to maintain target platforms