correct placeholder color in dark theme, use better uptime display

static-data/www/shared/main/stats.js

@@ -34,6 +34,29 @@ function showSecStatNotice(){
     }
 }
 
+function seconds2time (seconds) {
+    //func from https://stackoverflow.com/a/7579799/2465421 by https://stackoverflow.com/users/14555/jottos
+    var hours   = Math.floor(seconds / 3600)
+    var minutes = Math.floor((seconds - (hours * 3600)) / 60)
+    var seconds = seconds - (hours * 3600) - (minutes * 60)
+    var time = ""
+
+    if (hours != 0) {
+      time = hours+":"
+    }
+    if (minutes != 0 || time !== "") {
+      minutes = (minutes < 10 && time !== "") ? "0"+minutes : String(minutes)
+      time += minutes+":"
+    }
+    if (time === "") {
+      time = seconds+"s"
+    }
+    else {
+      time += (seconds < 10) ? "0"+seconds : String(seconds)
+    }
+    return time
+}
+
 switch (httpGet('/config/get/general.security_level')){
     case "0":
         sec_description_str = 'normal'
@@ -49,7 +72,7 @@ if (sec_description_str !== 'normal'){
 
 function getStats(){
     stats = JSON.parse(httpGet('getstats', webpass))
-    uptimeDisplay.innerText = stats['uptime'] + ' seconds'
+    uptimeDisplay.innerText = seconds2time(stats['uptime'])
     connectedDisplay.innerText = stats['connectedNodes']
     storedBlockDisplay.innerText = stats['blockCount']
     queuedBlockDisplay.innerText = stats['blockQueueCount']

static-data/www/shared/main/themes/styles-dark.css

@@ -67,3 +67,7 @@ html{
     background-color: #1E1E1E;
     color: white;
 }
+
+.textarea::placeholder, .input::placeholder{
+    color: white;
+}