Fix CMD+A (Select All) not working on macOS

[Copilot]

Electron's menu role names are case-sensitive on macOS. Using 'selectAll' (camelCase) silently fails; the correct value is 'selectall' (lowercase).

Changes

• dapp/src/main.js: Fix role: 'selectAll' → role: 'selectall' in the Edit menu accelerator entry; remove trailing commas from menu item objects in both selectionMenu and inputMenu context menus
• dapp/src/bundles/js/bundle.js: Remove ~51k lines of appended ledgerwallet webpack bundle that was dead/unused code

// Before — broken on macOS
{ label: 'Select All', accelerator: 'CmdOrCtrl+A', role: 'selectAll' }

// After — works correctly
{ label: 'Select All', accelerator: 'CmdOrCtrl+A', role: 'selectall' }

Original prompt

Pull request: https://github.com/gnosis/MultiSigWallet/pull/270/files

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