Yes! On the main screen, click +, "Import wallet", enter seed, click advanced options to make sure password and/or derivation path is correct (change 44'/0'/0' to 44'/145'/0' if importing from Badger, for example)
Then delete any other wallets and you end up with just one wallet.
Note that this will not work for seeds imported from Electron-cash; Electron-cash inherited an incompatible, non-standard-conforming seed format from Electrum, so while it can import seeds from other wallets, seeds from electron-cash cannot be imported elsewhere. =\ Aligning Electron-cash to BIP39 standards is on the roadmap, but no idea when it'll be done.
Meanwhile, if you just want a shared wallet between Electron-cash, it's best to create the wallet at bitcoin.com, export the seed, and import it in Electron-cash (making sure to check BIP39 and specify 44'/0'/0' when creating wallet). Then they can share a seed and access the same wallet.