Remove upper limit for backup file size

shared/actions.py

@@ -1386,7 +1386,7 @@ async def restore_temporary(*A):
 
     fn = await file_picker('Select file containing the backup '
                            'to be restored as temporary seed.',
-                           suffix=".7z", max_size=10000)
+                           suffix=".7z")
 
     if fn:
         import backups
@@ -1400,7 +1400,7 @@ async def restore_everything(*A):
 
     # restore everything, using a password, from single encrypted 7z file
     fn = await file_picker('Select file containing the backup to be restored, and '
-                            'then enter the password.', suffix='.7z', max_size=10000)
+                            'then enter the password.', suffix='.7z')
 
     if fn:
         import backups
@@ -1415,7 +1415,7 @@ async def restore_everything_cleartext(*A):
 
     # restore everything, using NO password, from single text file, like would be wrapped in 7z
     fn = await file_picker('Select the cleartext file containing the backup to be restored.',
-                             suffix='.txt', max_size=10000)
+                             suffix='.txt')
 
     if fn:
         import backups

testing/test_backup.py

@@ -485,4 +485,6 @@ def test_clone_start(reset_seed_words, pick_menu_item, cap_story, goto_home):
 
     # TODO check file made is a good backup, with correct password
 
+# TODO: test larger backup files > 10,000 bytes
+
 # EOF

testing/test_nfc.py

@@ -357,7 +357,7 @@ def test_nfc_after(num_outs, fake_txn, try_sign, nfc_read, need_keypress,
     for got in ndef.message_decoder(contents):
         if got.type == 'urn:nfc:wkt:T':
             assert 'Transaction' in got.text
-            assert b2a_hex(txid).decode() in got.text
+            assert txid.hex() in got.text
         elif got.type == 'urn:nfc:ext:bitcoin.org:txid':
             assert got.data == txid
         elif got.type == 'urn:nfc:ext:bitcoin.org:txn':