Added deprecation warning for dataflash saving.

locales/en/messages.json

@@ -2301,6 +2301,10 @@
     "dataflashFirmwareUpgradeRequired": {
         "message": "Dataflash requires firmware >= 1.8.0."
     },
+    "dataflashSavingDeprecationNote": {
+        "message": "(Deprecated, use '<b>$t(onboardLoggingRebootMscText.message)</b>' below:",
+        "description": "Used to indicate that saving log files through configurator is deprecated if MSC is available. Note: The seemingly unbalanced opening brace is intentional, there is a closing brace in a separate DOM element after the button."
+    },
     "dataflashButtonSaveFile": {
         "message": "Save flash to file..."
     },

src/css/tabs/onboard_logging.css

@@ -211,7 +211,7 @@
 }
 
 .tab-onboard_logging.msc-supported .require-msc-supported {
-    display: block;
+    display: unset;
 }
 
 .require-msc-not-ready {

src/tabs/onboard_logging.html

@@ -97,7 +97,9 @@
                         
                         <div>
                             <a class="regular-button erase-flash" href="#" i18n="dataflashButtonErase"></a>
+                            <span class="require-msc-supported" i18n="dataflashSavingDeprecationNote"></span>
                             <a class="regular-button save-flash" href="#" i18n="dataflashButtonSaveFile"></a>
+                            <span class="require-msc-supported">)</span>
                         </div>
                     </div>