Show cpu graph subtext

src/translation/en.json

@@ -945,11 +945,12 @@
         },
         "systemMemory": {
             "title": "System Memory",
-            "graphSubtext": "Only apps using more than 1GB of memory are shown"
+            "graphSubtext": "Only apps using more than {{ threshold }} of memory are shown"
         },
         "cpuUsage": {
             "title": "CPU Usage",
-            "graphTitle": "Percentage"
+            "graphTitle": "Percentage",
+            "graphSubtext": "Only apps using more than {{ threshold }} of cpu are shown"
         },
         "selectPeriodLabel": "Select Period"
     },

src/views/system.html

@@ -36,12 +36,13 @@
       <div class="card" style="min-height: 300px;">
         <label>{{ 'system.cpuUsage.title' | tr }}</label>
         <canvas id="graphsCPUChart" style="width: 100%;"></canvas>
+        <div class="text-muted text-center text-small">{{ 'system.cpuUsage.graphSubtext' | tr:{ threshold: '20 %'} }}</div>
 
         <br/>
 
         <label>{{ 'system.systemMemory.title' | tr }}</label>
         <canvas id="graphsSystemMemoryChart" style="width: 100%;"></canvas>
-        <div class="text-muted text-center text-small">{{ 'system.systemMemory.graphSubtext' | tr }}</div>
+        <div class="text-muted text-center text-small">{{ 'system.systemMemory.graphSubtext' | tr:{ threshold: '1 GiB'} }}</div>
       </div>
     </div>