Change category for plugins from 'network' to 'wireless'

plugins/wifi/wifi_signal

@@ -22,7 +22,7 @@ do_config () {
     echo "graph_title WiFi signal and noise"
     echo "graph_args --base 1000 -u 0"
     echo "graph_vlabel dB"
-    echo "graph_category network"
+    echo "graph_category wireless"
     echo "graph_info This graph shows the noise and singal levels of your WiFi devices"
     
     awk -F'[ :]*' '/:/ {

plugins/wifi/wireless_channel_active_

@@ -86,7 +86,7 @@ do_config() {
 	echo "graph_title Wireless channel usage - $phy"
 	echo "graph_args --base 1000 -r --lower-limit 0 --upper-limit 100"
 	echo "graph_vlabel Channel usage by time in percent"
-	echo "graph_category network"
+	echo "graph_category wireless"
 	echo "graph_info This graph shows the currently used channel of your WiFi device(s)"
 	get_physical_interfaces_channel_descriptions "$phy" | while read -r channel description; do
 		fieldname="channel_${channel}"

plugins/wifi/wireless_signal_noise_

@@ -110,7 +110,7 @@ do_config() {
 	echo "graph_title Wireless signal quality - $wifi"
 	echo "graph_args --upper-limit 0"
 	echo "graph_vlabel Signal and noise [dBm]"
-	echo "graph_category network"
+	echo "graph_category wireless"
 	echo "graph_info This graph shows the signal and noise for all wifi peers"
 	echo "noise.label Noise floor"
 	echo "noise.draw LINE"

plugins/wifi/wireless_signal_ranges_

@@ -99,7 +99,7 @@ do_config() {
 	echo "graph_title Wireless signal quality ranges - $wifi"
 	echo "graph_args --upper-limit 0"
 	echo "graph_vlabel Signal ranges"
-	echo "graph_category network"
+	echo "graph_category wireless"
 	echo "graph_info This graph shows numbers of peers with defined wifi signal ranges"
 	lower="noise"
 	for level in $SIGNAL_THRESHOLDS; do