Fix reloading for main file (#125)

For some reason, these two lines were flipped in the PR #102 

This was probably a mistake. The reloading of the main file was broken
after that change. Therefore, I have reverted it.

apps/jscad-web/main.js

@@ -135,8 +135,8 @@ document.body.ondrop = async ev => {
 
 async function reloadProject() {
   saveMap = {}
-  let { alias, script } = await analyzeProject(sw)
   sw.filesToCheck = []
+  let { alias, script } = await analyzeProject(sw)
   projectName = sw.projectName
   if (alias.length) {
     workerApi.jscadInit({ alias })