docs: improve RtD CSS for object signatures

Author: minijackson

docs/source/_static/api-font.css

@@ -0,0 +1,14 @@
+/* Use a mono font for every part of a signature (preference settings, API endpoint, etc.) */
+.sig:not(.sig-inline) {
+	font-family: SFMono-Regular, Menlo, Monaco, Consolas, Liberation Mono, Courier New, Courier, monospace;
+}
+
+/* Make the RtD theme respect whitespaces */
+.property {
+	display: inline !important;
+	padding-right: 0 !important;
+}
+
+.sig-prename {
+	font-weight: normal;
+}

docs/source/conf.py

@@ -138,6 +138,10 @@ def find_phoebus_version() -> str:
 # so a file named "default.css" will overwrite the builtin "default.css".
 html_static_path = ['_static']
 
+html_css_files = [
+    'api-font.css',
+]
+
 # If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
 # using the given strftime format.
 #html_last_updated_fmt = '%b %d, %Y'