Merge branch 'mail-fix-style' into 'stable-3.1'

Mail: domain field was only few millimeter in width in forms - now it's at least 170px

Idk if you like this solution but currently this is unviewable as you can see here
![ispc_new_mail](/uploads/b554471201aee8bbb11f64d01ec38a74/ispc_new_mail.PNG)


See merge request !316

Author: Till Brehm

interface/web/mail/templates/mail_alias_edit.htm

@@ -10,7 +10,7 @@ <h1><tmpl_var name="list_head_txt"></h1>
 						<input type="text" id="email_local_part" name="email_local_part" value="{tmpl_var name='email_local_part'}" class="form-control" />
 						<span class='input-group-addon'>@</span>
                         <div class='input-group-field'>
-							<select name="email_domain" id="email_domain" class="form-control" style="height:50px;">{tmpl_var name='email_domain'}</select>
+							<select name="email_domain" id="email_domain" class="form-control" style="height:50px;min-width:170px;">{tmpl_var name='email_domain'}</select>
                         </div>
                     </div>
 				</div>

interface/web/mail/templates/mail_forward_edit.htm

@@ -10,7 +10,7 @@ <h1><tmpl_var name="list_head_txt"></h1>
 						<input type="text" id="email_local_part" name="email_local_part" value="{tmpl_var name='email_local_part'}" class="form-control" />
 						<span class='input-group-addon'>@</span>
                         <div class='input-group-field'>
-							<select name="email_domain" id="email_domain" class="form-control" style="height:50px;">{tmpl_var name='email_domain'}</select>
+							<select name="email_domain" id="email_domain" class="form-control" style="height:50px;min-width:170px;">{tmpl_var name='email_domain'}</select>
                         </div>
                     </div>
 				</div>

interface/web/mail/templates/mail_user_mailbox_edit.htm

@@ -16,7 +16,7 @@ <h1><tmpl_var name="list_head_txt"></h1>
 						<input type="text" id="email_local_part" name="email_local_part" value="{tmpl_var name='email_local_part'}" class="form-control" />
 						<span class='input-group-addon'>@</span>
                         <div class='input-group-field'>
-							<select name="email_domain" id="email_domain" class="form-control" style="height:50px;">{tmpl_var name='email_domain'}</select>
+							<select name="email_domain" id="email_domain" class="form-control" style="height:50px;min-width:170px;">{tmpl_var name='email_domain'}</select>
                         </div>
                     </div>
 				</div>