FirmwareCache: naming fixes

src/js/FirmwareCache.js

@@ -172,7 +172,7 @@ let FirmwareCache = (function () {
     /**
      * Remove all cached data
      */
-    function destroy() {
+    function invalidate() {
         if (!journalLoaded) {
             console.warn("Cache journal not yet loaded");
             return undefined;
@@ -240,10 +240,10 @@ let FirmwareCache = (function () {
         load: () => {
             JournalStorage.load(onEntriesLoaded);
         },
-        flush: () => {
+        unload: () => {
             JournalStorage.persist(journal.toJSON());
             journal.clear();
         },
-        destroy: destroy,
+        invalidate: invalidate,
     };
 })();

src/js/tabs/firmware_flasher.js

@@ -545,7 +545,7 @@ TABS.firmware_flasher.initialize = function (callback) {
 
 TABS.firmware_flasher.cleanup = function (callback) {
     PortHandler.flush_callbacks();
-    FirmwareCache.flush();
+    FirmwareCache.unload();
 
     // unbind "global" events
     $(document).unbind('keypress');