Improve wifi configuration

src/freedombone-wifi

     echo 'macaddr_acl=0' >> /etc/hostapd/hostapd.conf
 
     if [ ! -f /etc/network/interfaces_original ]; then
-        if ! grep -q "# Hotspot" /etc/network/interfaces; then
+        if ! grep -q "# wifi enabled" /etc/network/interfaces; then
             cp /etc/network/interfaces /etc/network/interfaces_original
         fi
     fi  
     
-    echo '# Hotspot' > /etc/network/interfaces
+    echo '# wifi enabled' > /etc/network/interfaces
     echo 'auto lo br0' >> /etc/network/interfaces
     echo 'iface lo inet loopback' >> /etc/network/interfaces
     echo '' >> /etc/network/interfaces
 function wifi_wpa2_psk {
     ssid=$1
     passphrase=$2
-    psk=$(wifi_get_psk "$ssid" "$passphrase")
-    echo "auto $WIFI_INTERFACE" > /etc/network/interfaces.d/wifi
-    echo "iface $WIFI_INTERFACE inet dhcp" >> /etc/network/interfaces.d/wifi
-    echo "    wpa-ssid $ssid" >> /etc/network/interfaces.d/wifi
-    echo "    wpa-psk $psk" >> /etc/network/interfaces.d/wifi
+
+    if [ ! -f /etc/network/interfaces_original ]; then
+        if ! grep -q "# wifi enabled" /etc/network/interfaces; then
+            cp /etc/network/interfaces /etc/network/interfaces_original
+        fi
+    fi  
+    
+    echo '# wifi enabled' > /etc/network/interfaces
+    echo 'auto lo' >> /etc/network/interfaces
+    echo 'iface lo inet loopback' >> /etc/network/interfaces
+    echo '' >> /etc/network/interfaces
+    echo 'allow-hotplug eth0' >> /etc/network/interfaces
+    echo 'iface eth0 inet dhcp' >> /etc/network/interfaces
+    echo '' >> /etc/network/interfaces
+    echo 'allow-hotplug wlan0' >> /etc/network/interfaces
+    echo 'iface wlan0 inet manual' >> /etc/network/interfaces
+    echo 'wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf' >> /etc/network/interfaces
+    echo '' >> /etc/network/interfaces
+    echo 'iface default inet dhcp' >> /etc/network/interfaces
+
+    wpa_passphrase "$ssid" "$passphrase" > /etc/wpa_supplicant/wpa_supplicant.conf
+
+    systemctl restart network-manager
 }
 
 function wifi_none {