some translation fixes

src/www/diag_ipsec_leases.php

@@ -56,8 +56,8 @@ $ipsec_leases = json_decode(configd_run("ipsec list leases"), true);
                         <th></th>
                         <th colspan="3">
                           <?= gettext("Pool:") ?> <?= $pool ?>
-                          <?= gettext("usage:") ?> <?= $pool_data['usage'] ?>
-                          <?= gettext("online:") ?> <?= $pool_data['online'] ?>
+                          <?= gettext("Usage:") ?> <?= $pool_data['usage'] ?>
+                          <?= gettext("Online:") ?> <?= $pool_data['online'] ?>
                         </th>
                         <th></th>
                       </tr>

src/www/interfaces.php

@@ -1888,7 +1888,7 @@ include("head.inc");
                             <div class="hidden" for="help_for_gateway">
                               <?=gettext("If this interface is an Internet connection, select an existing Gateway from the list or add a new one using the link above."); ?><br />
                               <?=gettext("On local LANs the upstream gateway should be \"none\"."); ?>
-                              <p><strong><?=gettext("NOTE:"); ?></strong> <?= sprintf(gettext("You can manage Gateways %shere%s."),'<a target="_blank" href="system_gateways.php">','</a>') ?></p>
+                              <p><?= sprintf(gettext("You can manage Gateways %shere%s."),'<a target="_blank" href="system_gateways.php">','</a>') ?></p>
                             </div>
                           </td>
                         </tr>
@@ -2363,7 +2363,7 @@ include("head.inc");
                             <div class="hidden" for="help_for_gatewayv6">
                               <?=gettext("If this interface is an Internet connection, select an existing Gateway from the list or add a new one using the link above."); ?><br />
                               <?=gettext('On local LANs the upstream gateway should be "none".'); ?>
-                              <p><strong><?=gettext("NOTE:"); ?></strong> <?= sprintf(gettext("You can manage Gateways %shere%s."),'<a target="_blank" href="system_gateways.php">','</a>') ?></p>
+                              <p><?= sprintf(gettext("You can manage Gateways %shere%s."),'<a target="_blank" href="system_gateways.php">','</a>') ?></p>
                             </div>
                             <div class="hidden" id="addgatewayv6">
                               <br/>

src/www/services_dhcp.php

@@ -708,7 +708,7 @@ include("head.inc");
                       <td><i class="fa fa-info-circle text-muted"></i> <?=gettext("Enable");?> </td>
                       <td>
                         <input name="enable" id="enable" type="checkbox" value="yes" <?=!empty($pconfig['enable']) ? "checked=\"checked\"" : ""; ?> />
-                        <strong><?php printf(gettext("Enable DHCP server on %s interface"),!empty($config['interfaces'][$if]['descr']) ? htmlspecialchars($config['interfaces'][$if]['descr']) : strtoupper($if));?></strong>
+                        <strong><?php printf(gettext("Enable DHCP server on the %s interface"),!empty($config['interfaces'][$if]['descr']) ? htmlspecialchars($config['interfaces'][$if]['descr']) : strtoupper($if));?></strong>
                       </td>
                     </tr>
 <?php