scripts ---> ubuntu/kubuntu dependancies + resolve issues with no changing themes

[jojo-rel]

Hello,
first of all, Thx for the sharing of your themes, they are great

1/ I added this code below in the function "install_dependancies()" for Ubuntu / kubuntu :

  install_dependencies(){  
     .....
    # kubuntu
    elif [ -x "$(command -v apt)" ];
    then
        echo -e "${green}[*] Installing packages using apt.${no_color}"
        sudo apt update && sudo apt upgrade
        sudo apt install sddm qt6-base-dev qt6-svg-dev qt6-virtualkeyboard-dev qt6-multimedia-dev
    else
        echo -e "${red}[*] FAILED TO INSTALL PACKAGE: Package manager not found. You must manually install dependencies.">&2;
    fi
}

2/ I had issues with the theme not changing in the "select theme" step ( apparently the editing of the line "ConfigFile" of "metadata.desktop" didn't work for me)
so I replace in fonction "select_theme()" :
selected_theme=$(echo "$@" | cut -d ' ' -f $(("new_number"))) by selected_theme=$(echo "$@" | cut -d ' ' -f $new_number)

And it work perfcectly for kubuntu, thx again for the themes