Big Sur re-design (special thanks to @edwardbattistini for designing the app, creating the new menu bar icons and creating the new app icon)

Fixed a bug that would cause the network speed to not have enough space when speed is above 10.00 MB/s
Fixed a bug that would not show the app icon in the dock when minimizing the window
Fixed a bug that would reset the app settings when new user settings are introduced
Fixed a bug that would draw the menu bar icons in the wrong theme when having 'Auto-Appearance' activated

Fixed a bug that would cause the app to not start after login
Fixed a bug that would cause the app to immediately crash after starting it
Fixed a bug that would dismiss the battery notifications to fast
Fixed a memory leak
Fixed a bug that would cause option "Show disk space usage" to be always ticked when reloading the view (thank you @gary-lgy)

It is now possible to export, import and reset the settings of the app under the app menu 'File' (thank you @Moneypulation)
It is now possible to display the used and free disk space in the menu bar (thank you @khorolets)

Fixed a bug that would cause the app to display wrong system information on the dashboard
Fix a bug that would cause the app to randomly crash
Fixed a bug that would prevent the app from showing a popup for a new update

Fixed a bug that would cause the cpu usage graph to spike to 100% while the actual usage is 0%
Fixed a bug that would not correctly display the "Show network usage" checkbox
Fixed a bug that would cause the network menu bar to display a bandwidth of zero while connected to a VPN
Fixed a bug that would cause iGlance to freeze after the machine was sleeping

It is now possible to export the most recent log file using `Diagnostics > Save Logfile...` in the app menu
It is now possible to open the preferences of the app using iGlance > Preferences in the app menu or by pressing CMD + , while the iGlance window is active

Fixed a bug that would show the wrong available memory in the menu of the memory menu bar item
Fixed a bug that would cause the app to freeze after waking the machine from sleep
Fixed a bug that would cause the cpu bar graph to be fully drawn while the machine is not under load

The setting Advanced Logging is now saved when quitting the app
The app doesn't crash anymore when changing the network interface (e.g. when connecting to a VPN)

New GUI
App is now automatically updated using Sparkle
AppMover asks to move the app into the Applications folder on startup
The percentage of the battery can now be displayed in the menu bar
When displaying the remaining chargin/discharging time, the current status of the battery while charging is displayed (Not Charging, Charging, Charged)
The total transmitted data is now displayed in the network menu
The app is now published under the GNU GPLv3 license