Add support for multiple chat sessions in the desktop application (#639)

* Add chat sessions to the desktop application
* Increase width of the main chat body to 90vw
* Update the version of electron
* Render the default message if chat history fails to load
* Merge conversation migrations and fix slug setting
* Update the welcome message, use the hostURL, and update background color for chat actions
* Only update the window's web contents if the page is config

src/interface/desktop/main.js

@@ -225,7 +225,8 @@ function pushDataToKhoj (regenerate = false) {
     .finally(() => {
         // Syncing complete
         syncing = false;
-        if (win = BrowserWindow.getAllWindows()[0]) {
+        const win = BrowserWindow.getAllWindows().find(win => win.webContents.getURL().includes('config'));
+        if (win) {
             win.webContents.send('update-state', state);
         }
     });