Arch Linux

Description:
dex[1692]: blueman-applet 08.57.51 ERROR PluginManager:91 load_plugin: Unable to load plugin module AppIndicator
dex[1692]: Traceback (most recent call last):
dex[1692]: File "/usr/lib/python3.9/site-packages/blueman/plugins/applet/AppIndicator.py", line 7, in <module>
dex[1692]: require_version('AppIndicator3', '0.1')
dex[1692]: File "/usr/lib/python3.9/site-packages/gi/__init__.py", line 126, in require_version
dex[1692]: raise ValueError('Namespace %s not available' % namespace)
dex[1692]: ValueError: Namespace AppIndicator3 not available

Additional info:
* package version(s) v2.1.4

Low severity because it seems to work regardless, at least to the extent that I use it.

Steps to reproduce:
1. `$ blueman-applet`

```
blueman-applet version 2.1.4 starting
blueman-applet 10.21.36 ERROR PluginManager:91 load_plugin: Unable to load plugin module AppIndicator
Traceback (most recent call last):
File "/usr/lib/python3.9/site-packages/blueman/plugins/applet/AppIndicator.py", line 7, in <module>
require_version('AppIndicator3', '0.1')
File "/usr/lib/python3.9/site-packages/gi/__init__.py", line 126, in require_version
raise ValueError('Namespace %s not available' % namespace)
ValueError: Namespace AppIndicator3 not available

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/lib/python3.9/site-packages/blueman/main/PluginManager.py", line 89, in load_plugin
importlib.import_module(self.module_path.__name__ + ".%s" % plugin)
File "/usr/lib/python3.9/importlib/__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 680, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 855, in exec_module
File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
File "/usr/lib/python3.9/site-packages/blueman/plugins/applet/AppIndicator.py", line 9, in <module>
raise ImportError("AppIndicator3 not found")
ImportError: AppIndicator3 not found
blueman-applet 10.21.36 WARNING PluginManager:148 __load_plugin: Not loading PPPSupport because its conflict has higher priority
blueman-applet 10.21.36 WARNING TransferService:189 _make_share_path: Failed to get Download dir from XDG
blueman-applet 10.21.36 WARNING PluginManager:148 __load_plugin: Not loading DhcpClient because its conflict has higher priority
blueman-tray version 2.1.4 starting
```