Ditch the abandoned ngx-bootstrap-icons by rolling our own

src-ui/package.json

@@ -28,11 +28,11 @@
     "@ngneat/dirty-check-forms": "^3.0.3",
     "@popperjs/core": "^2.11.8",
     "bootstrap": "^5.3.8",
+    "bootstrap-icons": "^1.13.2",
     "file-saver": "^2.0.5",
     "lodash-es": "^4.18.1",
     "marked": "~18.1.1",
     "mime-names": "^1.0.0",
-    "ngx-bootstrap-icons": "^1.9.3",
     "ngx-color": "^10.1.0",
     "ngx-cookie-service": "^22.0.0",
     "ngx-device-detector": "^12.0.0",