Fix settings page exception

Author: ericdallo

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ## [Unreleased]
 
+- Fix Settings page exception when more than a project was opened and closed.
+
 ## 3.0.1
 
 - Bump clj4intellij to 0.6.3.

src/main/clojure/com/github/clojure_lsp/intellij/db.clj

@@ -32,5 +32,9 @@
                                   (update projects (.getBasePath project) #(merge (assoc empty-project :project project) %))))))
 
 (defn all-projects []
-  (remove nil?
-          (mapv :project (vals (:projects @db*)))))
+  (->> @db*
+       :projects
+       vals
+       (mapv :project)
+       (remove nil?)
+       (remove #(.isDisposed %))))