fix: ask a card setup for its own card

A card system chosen on a computer, from --platform, the setup list, its
filter or the line-mode menu, always asks for its card. The card screen
lists only the cards whose files say they run that system, offers Look
again, and checks a browsed, typed or --dest folder as --dest is checked.
The line-mode Card root prompt lists the mounted drives, asks again on a
missing or foreign root, and asks before creating several folders. On the
device the detected folder is offered, and the bound card is forgotten
when another setup is chosen.

install/launchers/index.json

@@ -27,8 +27,8 @@
         {
           "dest": "roms/ports/retrobios/install.py",
           "repo_path": "install.py",
-          "size": 636292,
-          "sha256": "000b7e9e965f6d81c254d7ee7967077f9bbae8aca2286179f31d4f4f7b555d06",
+          "size": 646794,
+          "sha256": "8833256124ffdfa38865e7b065f2720ec20997e1a91ba340eab4067e31b20727",
           "executable": false
         },
         {
@@ -71,8 +71,8 @@
     "muos": {
       "archive": {
         "dest": "ARCHIVE/RetroBIOS.muxapp",
-        "size": 688841,
-        "sha256": "65c0ff1debcc384c1a6da526e4c92505a1628036cc4c7f51928d5253fbd07484"
+        "size": 699343,
+        "sha256": "42226d45d6a31c86b726b1af321e043f9894f9993d8c6de0f16cc84c04a2a1ed"
       },
       "members": [
         {
@@ -92,8 +92,8 @@
         {
           "name": "RetroBIOS/install.py",
           "repo_path": "install.py",
-          "size": 636292,
-          "sha256": "000b7e9e965f6d81c254d7ee7967077f9bbae8aca2286179f31d4f4f7b555d06",
+          "size": 646794,
+          "sha256": "8833256124ffdfa38865e7b065f2720ec20997e1a91ba340eab4067e31b20727",
           "executable": false
         },
         {
@@ -166,8 +166,8 @@
         {
           "dest": ".config/modules/retrobios/install.py",
           "repo_path": "install.py",
-          "size": 636292,
-          "sha256": "000b7e9e965f6d81c254d7ee7967077f9bbae8aca2286179f31d4f4f7b555d06",
+          "size": 646794,
+          "sha256": "8833256124ffdfa38865e7b065f2720ec20997e1a91ba340eab4067e31b20727",
           "executable": false
         },
         {