Update some i18n labels to use the correct casing (camelCase) and the

correct prefix "pidTuning".  The prefixes generally seems to match the
tab source files.

_locales/en/messages.json

@@ -1203,28 +1203,28 @@
     "controlAxisAux8": {
         "message": "AUX 8"
     },
-    "pid_label_basic": {
+    "pidTuningBasic": {
         "message": "Basic/Acro"
     },
-    "pid_label_level": {
+    "pidTuningLevel": {
         "message": "Angle/Horizon"
     },
-    "pid_label_alt": {
+    "pidTuningAltitude": {
         "message": "Barometer & Sonar/Altitude"
     },
-    "pid_label_mag": {
+    "pidTuningMag": {
         "message": "Magnometer/Heading"
     },
-    "pid_label_gps": {
+    "pidTuningGps": {
         "message": "GPS Navigation"
     },
-    "pid_level_labelP": {
+    "pidTuningLevelP": {
         "message": "Strength (Angle)"
     },
-    "pid_level_labelI": {
+    "pidTuningLevelI": {
         "message": "Strength (Horizon)"
     },
-    "pid_level_labelD": {
+    "pidTuningLevelD": {
         "message": "Transition (Horizon)"
     },
     "pidHelp1": {

tabs/pid_tuning.html

@@ -39,7 +39,7 @@
                     <table id="pid_main" class="pid_tuning">
                         <tr>
                             <th colspan="4">
-                                <div class="pid_mode" i18n="pid_label_basic"></div>
+                                <div class="pid_mode" i18n="pidTuningBasic"></div>
                             </th>
                         </tr>
                         <tr class="ROLL">
@@ -67,7 +67,7 @@
                     <table id="pid_baro" class="pid_tuning">
                         <tr>
                             <th colspan="4">
-                                <div class="pid_mode" i18n="pid_label_alt"></div>
+                                <div class="pid_mode" i18n="pidTuningAltitude"></div>
                             </th>
                         </tr>
                         <tr class="ALT">
@@ -88,7 +88,7 @@
                     <table id="pid_mag" class="pid_tuning">
                         <tr>
                             <th colspan="4">
-                                <div class="pid_mode" i18n="pid_label_mag"></div>
+                                <div class="pid_mode" i18n="pidTuningMag"></div>
                             </th>
                         </tr>
                         <tr class="MAG">
@@ -102,7 +102,7 @@
                     <table id="pid_gps" class="pid_tuning">
                         <tr>
                             <th colspan="4">
-                                <div class="pid_mode" i18n="pid_label_gps"></div>
+                                <div class="pid_mode" i18n="pidTuningGps"></div>
                             </th>
                         </tr>
                         <tr class="Pos">
@@ -134,14 +134,14 @@
                             <th colspan="4">
                                 <div class="pid_mode">
                                     <div style="width: 25%; float: left; text-align: left;">
-                                        <div i18n="pid_label_level" style="float:left;"></div>
+                                        <div i18n="pidTuningLevel" style="float:left;"></div>
                                         <div class="helpicon cf_tip">
                                             <div class="cf_tooltiptext" i18n="pidHelp1" style="display: none;"></div>
                                         </div>
                                     </div>
-                                    <div style="width:25%; float:left;" i18n="pid_level_labelP"></div>
-                                    <div style="width:25%; float:left;" i18n="pid_level_labelI"></div>
-                                    <div style="width:25%; float:left;" i18n="pid_level_labelD"></div>
+                                    <div style="width:25%; float:left;" i18n="pidTuningLevelP"></div>
+                                    <div style="width:25%; float:left;" i18n="pidTuningLevelI"></div>
+                                    <div style="width:25%; float:left;" i18n="pidTuningLevelD"></div>
                                 </div>
                             </th>
                         </tr>