tweak FW upload UI

components/wifi-manager/code.js

@@ -368,7 +368,6 @@ $(document).ready(function(){
         console.log('sent config JSON with data:', JSON.stringify(data));
     });
     $("#fwUpload").on("click", function() {
-    	
         var upload_path = "/flash.json";
         var fileInput = document.getElementById("flashfilename").files;
         if (fileInput.length == 0) {

components/wifi-manager/http_server_handlers.c

@@ -430,13 +430,13 @@ esp_err_t resource_filehandler(httpd_req_t *req){
 			httpd_resp_set_hdr(req, "Content-Encoding", "gzip");
 		    const size_t file_size = (bootstrap_js_gz_end - bootstrap_js_gz_start);
 		    httpd_resp_send(req, (const char *)bootstrap_js_gz_start, file_size);
-		}
+	}
 	else if(strstr(filename, "bootstrap.css")) {
 			set_content_type_from_file(req, filename);
 			httpd_resp_set_hdr(req, "Content-Encoding", "gzip");
 		    const size_t file_size = (bootstrap_css_gz_end - bootstrap_css_gz_start);
 		    httpd_resp_send(req, (const char *)bootstrap_css_gz_start, file_size);
-		}
+    }
 	else {
 	   ESP_LOGE_LOC(TAG, "Unknown resource [%s] from path [%s] ", filename,filepath);
 	   /* Respond with 404 Not Found */

components/wifi-manager/index.html

@@ -346,19 +346,16 @@
                     <h2>Firmware URL:</h2>
                     <textarea id="fwurl" maxlength="350"></textarea>
                     <div class="buttons">
-                    	<input type="button" id="flash" class="btn btn-danger" value="Flash!" /><span id="flash-status"></span>
+                        <input type="button" id="flash" class="btn btn-danger" value="Flash!" /><span id="flash-status"></span>
                     </div>
-                     <br />OR<br />
-                    <div class="input-group mb-3" id="uploaddiv">
-                        <div class="custom-file">
-                            <input type="file" class="custom-file-input" id="flashfilename">
-                            <label class="custom-file-label" for="flashfilename"></label>
-                        </div>
-                        <div class="input-group-append">
-                            <span class="input-group-text" id="fwUpload">Upload</span>
+                    <p>OR</p>
+                    <div class="form-group">
+                        <input type="file" class="form-control-file" id="flashfilename" aria-describedby="fileHelp">
+                        <div class="buttons">
+                            <button type="button" class="btn btn-danger" id="fwUpload">Upload!</button>
                         </div>
                     </div>
-                    
+
                     <div id="otadiv">
                         <div class="progress" id="progress">
                             <div class="progress-bar" role="progressbar" aria-valuemin="0" aria-valuemax="100" style="width:0%">