change range db layout view

Author: franck-gaspoz

oscillo.html

@@ -688,10 +688,10 @@ <h4>github project page: <a rel="noopener"
                 <span class="opt-label no-margin">Size</span>
                 <span id="opt_ch_fft_size" class="no-margin opt-value-edit opt-value-with-unit read-only"></span>
                 <span class="opt-label">Spl</span>
-                <span class="opt-label no-margin">Min Db</span>
+                <span class="opt-label no-margin">Range</span>
                 <span id="opt_ch_mindb" class="no-margin opt-value-edit opt-value-with-unit read-only"></span>
-                <span class="opt-label">Db</span>
-                <span class="opt-label no-margin">Max Db</span>
+                <span class="opt-label no-margin">Db</span>
+                <span class="opt-label no-margin">...</span>
                 <span id="opt_ch_maxdb" class="no-margin opt-value-edit opt-value-with-unit read-only"></span>
                 <span class="opt-label">Db</span>
             </div>