l10n: adding more l10n strings from bw-calculator

There are more strings in bw-calculator*.php which should be added to
the l10n catalogue so the tool site is fully translatable.

app/tools/ip-calculator/bw-calculator-result.php

@@ -29,20 +29,20 @@ else 				{ $type = "WAN"; }
 <hr>
 <p>
 
-<strong>Transfer time (h:m:s):</strong>
+<strong><?php print _("Transfer time (h:m:s)"); ?>:</strong>
 <div class='res_val'><?php print $User->sec2hms($time); ?></div>
 
 <?php if(!isset($_POST['widget'])) { ?>
 <div class="clearfix"></div>
 
 <br><br>
-<strong>Calculation parameters:</strong>
+<strong><?php print _("Calculation parameters"); ?>:</strong>
 <ul>
-	<li> TCP window size: <?php print $tcp; ?></li>
-	<li> Delay: <?php print $delay; ?> ms</li>
-	<li> Speed: <?php print $mbps; ?> MBps</li>
-	<li> Newtork type: <?php print $type; ?></li>
-	<li> File size: <?php print $fsize; ?> MB</li>
+	<li> <?php print _("TCP window size").": $tcp"; ?></li>
+	<li> <?php print _("Delay").": $delay"." "._("ms"); ?></li>
+	<li> <?php print _("Speed").": $mbps"." "._("MBps"); ?></li>
+	<li> <?php print _("Newtork type").": $type"; ?></li>
+	<li> <?php print _("File size").": $fsize"." "."MB"; ?></li>
 </ul>
 </p>
 <br>

app/tools/ip-calculator/bw-calculator.php

@@ -245,13 +245,13 @@ $(document).ready(function () {
 <?php if(!isset($widget)) { ?>
 <h4><?php print _('Bandwidth calculator');?></h4>
 <hr>
-<?php print _("Select TCP window size, delay and Filesize to calculate how long file transfer will take."); ?>
+<?php print _("Select TCP window size, delay and file size to calculate how long file transfer will take."); ?>
 
 <br><br><br>
 <?php } ?>
 
 <div class="slider_overlay">
-	<p>TCP Window size:</p>
+	<p><?php print _("TCP window size").":"; ?></p>
 	<div class='res_sel' id="slider1"></div>
 	<div class='res_val' id="slider1-val">50000</div>
 	<br>
@@ -260,7 +260,7 @@ $(document).ready(function () {
 <div class="clearfix"></div>
 
 <div class="slider_overlay">
-	<p>Delay:</p>
+	<p><?php print _("Delay").":"; ?></p>
 	<div class='res_sel' id="slider2"></div>
 	<div class='res_val' id="slider2-val">10 ms</div>
 	<br>
@@ -269,7 +269,7 @@ $(document).ready(function () {
 <div class="clearfix"></div>
 
 <div class="slider_overlay">
-	<p>Filesize:</p>
+	<p><?php print _("File size").":"; ?></p>
 	<div class='res_sel' id="slider3"></div>
 	<div class='res_val' id="slider3-val">1 GByte</div>
 	<br>