Changes shortcut keys for diff with previous commands

Adds diff with next command
Fixes #45 - Keyboard Shortcut collision with Project Manager
Preps v2.11.2

src/commands/diffLineWithPrevious.ts

@@ -60,6 +60,7 @@ export class DiffLineWithPreviousCommand extends ActiveEditorCommand {
                 this.git.getVersionedFile(commit.uri.fsPath, commit.repoPath, commit.sha)
             ]);
             await commands.executeCommand(BuiltInCommands.Diff, Uri.file(lhs), Uri.file(rhs), `${path.basename(commit.uri.fsPath)} (${commit.sha}) ↔ ${path.basename(gitUri.fsPath)} (${gitUri.sha})`);
+            // TODO: Figure out how to focus the left pane
             return await commands.executeCommand(BuiltInCommands.RevealLine, { lineNumber: line, at: 'center' });
         }
         catch (ex) {