Fixing common issues

[AlphaTechnolog]

This PR aims to fix some common issues that i found when testing yoru on my machine, i've refactored some things to make them dynamically like the battery widget. the next list will describe in more detail what my changes was about:

• decreased a little the font size for the dismiss notification button which was looking kinda weird (looking like ...) on 1920x1080, this doesn't matters too much but idk, it's great to have like this i guess.
• i've added a validation for the c.requests_no_titlebar property in the titlebars definition to don't apply titlebars for apps which don't wanna get them.
• complete refactor for the battery/upower signals to make them autodetect the device + check if there's no device running (useful for desktop computers, or laptops without battery per example).
• removing --experimental-backends on picom cuz idk it was showing in xephyr logs that it didn't exist anymore
• i've see that if i change the github username, the github widget didn't refresh if i didn't do something like rm -rf ~/.cache/awesome, so i've added a code block which removes ~/.config/awesome/github if it sees that im changing that username credential by using a new cache file in ~/.config/awesome/github/username.txt.

im open to suggestions in general :)

[linuxmobile]

• i've see that if i change the github username, the github widget didn't refresh if i didn't do something like rm -rf ~/.cache/awesome, so i've added a code block which removes ~/.config/awesome/github if it sees that im changing that username credential by using a new cache file in ~/.config/awesome/github/username.txt.

The new cache file directory is ~/.cache/awesome/github/username.txt not ~/.config/awesome/github/username.txt

[AlphaTechnolog]

• i've see that if i change the github username, the github widget didn't refresh if i didn't do something like rm -rf ~/.cache/awesome, so i've added a code block which removes ~/.config/awesome/github if it sees that im changing that username credential by using a new cache file in ~/.config/awesome/github/username.txt.

The new cache file directory is ~/.cache/awesome/github/username.txt not ~/.config/awesome/github/username.txt

ah yeah u're right, my bad

[linuxmobile]

i can't get this working. It's been about a year now, and I still have the same problem. It is one of the best rice that exist, but I can't find the github configuration. My issue:

"missing credentials".