*Total -- 645.34kb -> 565.37kb (12.39%)

/src-tauri/assets/appIcons/Migration Assistant.app.png -- 49.37kb -> 37.47kb (24.1%)
/src-tauri/assets/appIcons/AirPort Utility.app.png -- 34.91kb -> 28.08kb (19.57%)
/docs/Banner-Image.png -- 116.76kb -> 94.57kb (19.01%)
/docs/preferences.png -- 33.92kb -> 27.83kb (17.96%)
/src-tauri/assets/appIcons/Calendar.app.png -- 42.41kb -> 34.82kb (17.88%)
/src-tauri/assets/appIcons/Photo Booth.app.png -- 16.06kb -> 13.95kb (13.16%)
/src/dmg-background.png -- 201.67kb -> 185.42kb (8.06%)
/src-tauri/icons/128x128@2x.png -- 19.90kb -> 18.52kb (6.94%)
/docs/themes/theme-blue/theme-blue.png -- 20.76kb -> 19.50kb (6.07%)
/docs/themes/theme-default/theme-default.png -- 18.71kb -> 17.72kb (5.3%)
/docs/themes/theme-green/theme-green.png -- 20.70kb -> 19.61kb (5.29%)
/src-tauri/icons/128x128.png -- 5.95kb -> 5.74kb (3.63%)
/src-tauri/assets/appIcons/System Settings.app.png -- 64.22kb -> 62.15kb (3.23%)

Signed-off-by: ImgBotApp <ImgBotHelp@gmail.com>

Signed-off-by: ImgBotApp <ImgBotHelp@gmail.com>
Co-authored-by: ImgBotApp <ImgBotHelp@gmail.com>

Fix error when offset starts with '+' or '-':

```
thread 'tokio-runtime-worker' panicked at 'called Result::unwrap() on an Err value: "Timezone information not found"', src/util/calculator.rs:26:32

note: run with RUST_BACKTRACE=1 environment variable to display a backtrace
```

For example for `Asia/Almaty` (located in Kazakhstan) `offset_from_utc_date` returns "+6" rather than "GMT+6".

This leads to an error beacuse Regex in Smartcalc expects offset with `GMT` in string:

https://github.com/erhanbaris/smartcalc/blob/cd39b590aba74e8ca326ba78acea488d0550a3e8/src/json/config.json#L35