fix(@angular/cli): improve logs in ng update
fix(@angular/cli): improve logs in ng update

These addresses;
- When a large number of migration are executed, it's hard to differentiate between the title and description.
- Fix alignments of logs

ocombe/angular-cli,angular/angular-cli,catull/angular-cli,geofffilippi/angular-cli,clydin/angular-cli,clydin/angular-cli,Brocco/angular-cli,Brocco/angular-cli,ocombe/angular-cli,catull/angular-cli,geofffilippi/angular-cli,ocombe/angular-cli,Brocco/angular-cli,geofffilippi/angular-cli,clydin/angular-cli,ocombe/angular-cli,angular/angular-cli,angular/angular-cli,ocombe/angular-cli,geofffilippi/angular-cli,catull/angular-cli,catull/angular-cli,clydin/angular-cli,angular/angular-cli,Brocco/angular-cli,Brocco/angular-cli