Improve PADD version comparison

Signed-off-by: Christian König <ckoenig@posteo.de>

padd.sh

@@ -575,10 +575,11 @@ GetVersionInformation() {
     if [ "${padd_version_latest}" = "" ]; then
       padd_version_heatmap=${yellow_text}
     else
-      if [ "${padd_version}" != "${padd_version_latest}" ]; then
+      if [ $(VersionConverter "${padd_version}") -lt $(VersionConverter "${padd_version_latest}") ]; then
         padd_out_of_date_flag="true"
         padd_version_heatmap=${red_text}
       else
+        # local and remote PADD version match or local is newer
         padd_version_heatmap=${green_text}
       fi
     fi
@@ -1060,6 +1061,12 @@ CheckConnectivity() {
   fi
 }
 
+# converts a given version string e.g. v3.7.1 to 3007001000 to allow for easier comparison of multi digit version numbers
+# credits https://apple.stackexchange.com/a/123408
+VersionConverter() { 
+  echo "$@" | tr -d '[:alpha:]' | awk -F. '{ printf("%d%03d%03d%03d\n", $1,$2,$3,$4); }'; 
+}
+
 ########################################## MAIN FUNCTIONS ##########################################
 
 OutputJSON() {