Fix threshold discussion

app.py

@@ -164,8 +164,8 @@ app_ui = ui.page_fluid(
                 f"Before analysing images it is possible to change the threshold used to discard overlapping segmentations produced by the model. "
                 f"The default threshold is {OPTIMAL_NMS_THRESHOLD} as this was found to be optimal for our data, but you can adjust this value in "
                 f"the slider."
-                f" We recommend leaving this as the default, and only decreasing the value if you find that your images have many overlapping seeds "
-                f"and some of them are not being included in the output. Similarly, you can increase this value if your images have very few "
+                f" We recommend leaving this as the default, and only increasing the value if you find that your images have many overlapping seeds "
+                f"and some of them are not being included in the output. Similarly, you can decrease this value if your images have very few "
                 f"overlapping seeds and the output includes multiple segmentations of the same seed."),
             ui.p("Note that ", ui.HTML("<b>the upper limit for the number of detected seeds in a single image is 800</b>"), ' and ',
                  ui.HTML("<b>the app has a maximum capacity of approx. 50 images</b>"),