Prevent manual and automatic mod list updates running simultaneously

Users can trigger updating the online mod list from the settings view.
Use the status text to show if an update is already in progress and
prevent user actions from triggering another one, since they would just
compete for the same bandwidth and slow down the manager.

src/components/settings-components/SettingsView.vue

@@ -78,7 +78,6 @@ import UtilityMixin from '../mixins/UtilityMixin.vue';
         private search: string = '';
         private managerVersionNumber: VersionNumber = ManagerInformation.VERSION;
         private searchableSettings: SettingsRow[] = [];
-        private downloadingThunderstoreModList: boolean = false;
 
         get activeGame(): Game {
             return this.$store.state.activeGame;
@@ -299,7 +298,7 @@ import UtilityMixin from '../mixins/UtilityMixin.vue';
                 'Refresh online mod list',
                 'Check for any new mod releases.',
                 async () => {
-                        if (this.downloadingThunderstoreModList) {
+                        if (this.$store.state.tsMods.isBackgroundUpdateInProgress) {
                             return "Checking for new releases";
                         }
                         if (this.$store.state.tsMods.connectionError.length > 0) {
@@ -312,17 +311,19 @@ import UtilityMixin from '../mixins/UtilityMixin.vue';
                     },
                 'fa-exchange-alt',
                 async () => {
-                    if (!this.downloadingThunderstoreModList) {
-                        this.downloadingThunderstoreModList = true;
-                        this.$store.commit("tsMods/setConnectionError", "");
+                    if (this.$store.state.tsMods.isBackgroundUpdateInProgress) {
+                        return;
+                    }
 
-                        try {
-                            await this.refreshThunderstoreModList();
-                        } catch (e) {
-                            this.$store.commit("tsMods/setConnectionError", e);
-                        } finally {
-                            this.downloadingThunderstoreModList = false;
-                        }
+                    this.$store.commit("tsMods/startBackgroundUpdate");
+                    this.$store.commit("tsMods/setConnectionError", "");
+
+                    try {
+                        await this.refreshThunderstoreModList();
+                    } catch (e) {
+                        this.$store.commit("tsMods/setConnectionError", e);
+                    } finally {
+                        this.$store.commit("tsMods/finishBackgroundUpdate");
                     }
                 }
             ),