New theme for web UI (#957)

* Docker environment fixes

* New theme for web UI

* Apply breaking wrap to filenames only

* Reduce font sizes, whitespace and padding

* Right align action fields/buttons

* Improve mobile header, hide superfluous UI elements when logged out, drop placeholders from login labels, various other adjustments

* Force footer to bottom of screen

* Show manual link to logged out users

* Reduce header text size on desktop

* Fix incorrect selector ID

* Fix selector referencing old class name

* Fix right-aligned message when images table empty

* Add CSS linter/auto-formatter

* Run Stylelint + Prettier against modern theme CSS

* Select default theme based on browser’s user agent

* Style inputs on mobile/tablet devices

* Fixes for Safari 14 on iOS + iPad OS

* Explicitly define mobile browser support, switch to bare ua-parser without user-agent wrapper

* Add LICENSE file for modern theme icons

* Improve theme selection query string/field naming.

* Remove patch workaround from Docker build

* Update log level for UAs to info

* Move Bootstrap Reboot CSS to CDN

* Account for LUN column in attached devices table

* Prevent wrapping of config forms on small viewports

* Fix Stylelint issues

* Auto-format CSS with Prettier

python/web/tests/api/test_settings.py

@@ -150,3 +150,49 @@ def test_save_load_and_delete_configs(env, http_client):
     )
 
     assert config_json_file not in http_client.get("/").json()["data"]["config_files"]
+
+
+# route("/theme", methods=["POST"])
+@pytest.mark.parametrize(
+    "theme",
+    [
+        "modern",
+        "classic",
+    ],
+)
+def test_set_theme(http_client, theme):
+    response = http_client.post(
+        "/theme",
+        data={
+            "theme": theme,
+        },
+    )
+
+    response_data = response.json()
+
+    assert response.status_code == 200
+    assert response_data["status"] == STATUS_SUCCESS
+    assert response_data["messages"][0]["message"] == f"Theme changed to '{theme}'."
+
+
+# route("/theme", methods=["GET"])
+@pytest.mark.parametrize(
+    "theme",
+    [
+        "modern",
+        "classic",
+    ],
+)
+def test_set_theme_via_query_string(http_client, theme):
+    response = http_client.get(
+        "/theme",
+        params={
+            "v": theme,
+        },
+    )
+
+    response_data = response.json()
+
+    assert response.status_code == 200
+    assert response_data["status"] == STATUS_SUCCESS
+    assert response_data["messages"][0]["message"] == f"Theme changed to '{theme}'."