Fix theme picker blur handler: always hide instead of switching

Author: Kinrany

src/librustdoc/html/render.rs

@@ -874,15 +874,23 @@ fn write_shared(
 r#"var themes = document.getElementById("theme-choices");
 var themePicker = document.getElementById("theme-picker");
 
+function showThemeButtonState() {{
+    themes.style.display = "none";
+    themePicker.style.borderBottomRightRadius = "3px";
+    themePicker.style.borderBottomLeftRadius = "3px";
+}}
+
+function hideThemeButtonState() {{
+    themes.style.display = "block";
+    themePicker.style.borderBottomRightRadius = "0";
+    themePicker.style.borderBottomLeftRadius = "0";
+}}
+        
 function switchThemeButtonState() {{
     if (themes.style.display === "block") {{
-        themes.style.display = "none";
-        themePicker.style.borderBottomRightRadius = "3px";
-        themePicker.style.borderBottomLeftRadius = "3px";
+        showThemeButtonState();
     }} else {{
-        themes.style.display = "block";
-        themePicker.style.borderBottomRightRadius = "0";
-        themePicker.style.borderBottomLeftRadius = "0";
+        hideThemeButtonState();
     }}
 }};
 
@@ -895,7 +903,7 @@ function handleThemeButtonsBlur(e) {{
         (!related ||
          (related.id !== "themePicker" &&
           (!related.parentNode || related.parentNode.id !== "theme-choices")))) {{
-        switchThemeButtonState();
+        hideThemeButtonState();
     }}
 }}