[Chore] Package Export, Blanks for fields, Styling (#421)

Co-authored-by: Tim Lorsbach <tim@lorsba.ch>
Reviewed-on: enviPath/enviPy#421

templates/predict_pathway.html

@@ -212,7 +212,13 @@
         e.preventDefault();
         const button = this;
         button.disabled = true;
-        button.textContent = "Predicting...";
+
+        // Set text depending on mode
+        if (document.getElementById("predict-submit-button").innerText === "Build") {
+          button.textContent = "Building...";
+        } else {
+          button.textContent = "Predicting...";
+        }
 
         // Get SMILES from either input or Ketcher
         const smilesInput = document.getElementById("predict-smiles");