frontend: dependency updates

Try to depend on some forked versions of packages that include bare
minimum Angular 15 support.

frontend/package.json

@@ -15,8 +15,8 @@
   },
   "private": true,
   "dependencies": {
-    "@agm/core": "^3.0.0-beta.0",
-    "@agm/snazzy-info-window": "^3.0.0-beta.0",
+    "@agm/core": "alanorth/angular-google-maps#angular-15",
+    "@agm/snazzy-info-window": "alanorth/angular-google-maps#angular-15",
     "@angular/animations": "^15.2.9",
     "@angular/cdk": "^15.2.9",
     "@angular/common": "^15.2.9",
@@ -29,16 +29,16 @@
     "@angular/router": "^15.2.9",
     "@auth0/angular-jwt": "^5.1.2",
     "@highcharts/map-collection": "^2.1.0",
-    "@material-extended/mde": "^3.0.3",
+    "@kumanu/angular-inviewport": "^16.0.2",
+    "@material-extended/mde": "alanorth/popover#angular-15",
     "@ng-select/ng-select": "^10.0.4",
     "@ngrx/effects": "^15.4.0",
     "@ngrx/store": "^15.4.0",
     "@ngrx/store-devtools": "^15.4.0",
     "@ngx-loading-bar/core": "^6.0.2",
     "@ngx-loading-bar/http-client": "^6.0.2",
     "@ngx-loading-bar/router": "^6.0.2",
-    "@nicky-lenaers/ngx-scroll-to": "^14.0.0",
-    "@thisissoon/angular-inviewport": "^4.2.2",
+    "@nicky-lenaers/ngx-scroll-to": "alanorth/angular-google-maps#angular-15",
     "@tinymce/tinymce-angular": "^7.0.0",
     "@types/scriptjs": "0.0.2",
     "bodybuilder": "^2.5.0",

frontend/src/app/explorer/explorer.module.ts

@@ -38,7 +38,7 @@ import { NouisliderModule } from 'ng2-nouislider';
 import { RangeComponent } from './filters/range/range.component';
 import { ScrollToComponent } from './dashboard/components/scroll-to/scroll-to.component';
 import { ScrollToModule } from '@nicky-lenaers/ngx-scroll-to';
-import { InViewportModule } from '@thisissoon/angular-inviewport';
+import { InViewportModule } from '@kumanu/angular-inviewport';
 import { HighchartsChartModule } from 'highcharts-angular';
 import { ChartComponent } from './dashboard/components/chart/chart.component';
 import { ListComponent } from './dashboard/components/list/list.component';