improvemets & fixes:

- added 'open with' handling to desktop shortcuts
- move logs button to app configuration
- fix sync progress disappearing after long hashing
- fix sync double file counter
- merge wine and proton prefix folders via symlink

src/fsutil.js

@@ -57,6 +57,15 @@ function progressGate(emit) {
 async function treeSize(root) {
   let files = 0
   let bytes = 0
+  // a symlink (or a plain file) as the root is the whole tree: walking it
+  // would measure whatever it points at, not what is about to be removed
+  let rootStat = null
+  try {
+    rootStat = await fsp.lstat(root)
+  } catch {
+    return { files, bytes }
+  }
+  if (!rootStat.isDirectory()) return { files: 1, bytes: rootStat.isSymbolicLink() ? 0 : rootStat.size }
   const walk = async dir => {
     let entries
     try {
@@ -150,6 +159,24 @@ async function removeTree(root, onProgress) {
   const tick = () => {
     if (gate) gate({ files, dirs, bytes }, false)
   }
+  // A symlink (or a file) as the root is removed as itself, never walked
+  // through: the root of an import/prefix can be a link to another disk, and
+  // deleting through it would take the target's files instead of the link.
+  let rootStat = null
+  try {
+    rootStat = await fsp.lstat(root)
+  } catch {
+    return { files, dirs, bytes }
+  }
+  if (!rootStat.isDirectory()) {
+    files = 1
+    bytes = rootStat.isSymbolicLink() ? 0 : rootStat.size
+    try {
+      await fsp.unlink(root)
+    } catch {}
+    if (gate) gate({ files, dirs, bytes }, true)
+    return { files, dirs, bytes }
+  }
   const walk = async dir => {
     let entries
     try {