Fix typo and improve i18n strings (#2123)

* Fix typo in /templates/pages/edit_web.html

* Fix and improve i18n strings

web/templates/pages/edit_server.html

@@ -946,7 +946,7 @@
 								<table style="<?php if (empty($v_security_adv)) echo 'display:none;';?>" id="security">
 									<tr>
 										<td class="section-title" onclick="javascript:elementHideShow('security-system-table',this);">
-											<?=('System');?>
+											<?=_('System');?>
 											<i class="fas fa-plus-square status-icon dim maroon section-hide-button"></i>
 										</td>
 									</tr>
@@ -1055,7 +1055,7 @@
 									<?php if (($_SESSION['userContext'] === "admin") && ($_SESSION['user'] === 'admin')) {?>
 										<tr>
 											<td class="section-title" onclick="javascript:elementHideShow('security-sysadminprotect-table',this);">
-												<?=('System Protection');?>
+												<?=_('System Protection');?>
 												<i class="fas fa-plus-square status-icon dim maroon section-hide-button"></i>
 											</td>
 										</tr>
@@ -1116,7 +1116,7 @@
 									<?php } ?>
 									<tr>
 										<td class="section-title" onclick="javascript:elementHideShow('security-policies-table',this);">
-											<?=('Policies');?>
+											<?=_('Policies');?>
 											<i class="fas fa-plus-square status-icon dim maroon section-hide-button"></i>
 										</td>
 									</tr>
@@ -1131,7 +1131,7 @@
 												<?php if ($_SESSION['POLICY_SYSTEM_ENABLE_BACON'] === 'true') { ?>
 												<tr>
 													<td class="vst-text input-label">
-														<?=_('Allow suspended users to log in with read-only access');?> <span class="hint">(Preview)</span>
+														<?=_('Allow suspended users to log in with read-only access');?> <span class="hint">(<?=_('Preview');?>)</span>
 													</td>
 												</tr>
 												<tr>

web/templates/pages/edit_web.html

@@ -351,7 +351,7 @@
 														</td>
 													</tr>
 													<tr id="letsinfo" style="display:<?php if ($v_letsencrypt == 'yes' || $v_letencrypt == 'on' ) { echo 'block';} else {echo 'none';} ?>">
-														<td><a href="#" onclick="elementHideShow('ssl-details'); return false;" class="generate"><?=_('Show Certifcate');?></a></td>
+														<td><a href="#" onclick="elementHideShow('ssl-details'); return false;" class="generate"><?=_('Show Certificate');?></a></td>
 													</tr>
 												</table>
 											</td>