fix: one size for the ticked systems on the plan

With systems ticked since the check, the headline counted them (About
3479 files, 82.2 MB) and the Install row kept the whole list's size
(Install 6.6 GB). _ticked_estimate is the one count both read, offline
the files the folders copied from hold.

install/launchers/index.json

@@ -27,8 +27,8 @@
         {
           "dest": "roms/ports/retrobios/install.py",
           "repo_path": "install.py",
-          "size": 1125652,
-          "sha256": "7bfcc3b63b3d8c34998e021d84f873a49c91837fc266e593e918ac7871ef78b2",
+          "size": 1126510,
+          "sha256": "1d6c36d12d2cb728020e8a4cf0994e7c1779a5f2903163a83ed4caea6c54cc42",
           "executable": false
         },
         {
@@ -71,8 +71,8 @@
     "muos": {
       "archive": {
         "dest": "ARCHIVE/RetroBIOS.muxapp",
-        "size": 1179279,
-        "sha256": "bce18e6f5457057162d0c9113a9c41bd6dad53bd5badaa46d44b62e7fd7a9299"
+        "size": 1180137,
+        "sha256": "193463b29e96c5380fe026134c8d0c76aa79b938b7f40de4a579bda7cec2b630"
       },
       "members": [
         {
@@ -92,8 +92,8 @@
         {
           "name": "RetroBIOS/install.py",
           "repo_path": "install.py",
-          "size": 1125652,
-          "sha256": "7bfcc3b63b3d8c34998e021d84f873a49c91837fc266e593e918ac7871ef78b2",
+          "size": 1126510,
+          "sha256": "1d6c36d12d2cb728020e8a4cf0994e7c1779a5f2903163a83ed4caea6c54cc42",
           "executable": false
         },
         {
@@ -166,8 +166,8 @@
         {
           "dest": ".config/modules/retrobios/install.py",
           "repo_path": "install.py",
-          "size": 1125652,
-          "sha256": "7bfcc3b63b3d8c34998e021d84f873a49c91837fc266e593e918ac7871ef78b2",
+          "size": 1126510,
+          "sha256": "1d6c36d12d2cb728020e8a4cf0994e7c1779a5f2903163a83ed4caea6c54cc42",
           "executable": false
         },
         {