YouTrack -> Slack notification readability fix

digest_overview_jabber.ftl

<#ftl attributes={"description":"Overview of the issue update in jabber notification"}>
<#escape x as x?html>
<p>
    <#assign priority = issue.Priority>
    <#assign isShowStopper = (!priority?is_enumerable && priority == "Show-stopper")>
    <#if change.hasEvent("CREATED")>
        <#if (!priority?is_enumerable && priority == "Show-stopper")>
            <@l10n>${issue.reporter.getVisibleName()} created show-stopper:</@l10n>
        <#else>
            <@l10n>${issue.reporter.getVisibleName()} created new issue:</@l10n>
        </#if>
    <#else>
        <#if from == to>
            <#if isShowStopper>
                <@l10n>You updated show-stopper:</@l10n>
            <#else>
                <@l10n>You updated issue:</@l10n>
            </#if>
        <#else>
            <#if isShowStopper>
                <@l10n>${from.getVisibleName()} updated show-stopper:</@l10n>
            <#else>
                <@l10n>${from.getVisibleName()} updated issue:</@l10n>
            </#if>
        </#if>
    </#if>
</p>
</#escape>

issue_digest_jabber.ftl

-<br><br>
<#include "digest_overview_jabber.ftl"><br>
*${issue.summary}*<br>
<#list change.events as event>
    <#assign category = event.category>
    <#if category == "VOTERS">
        <#if event.getRemovedValues()?has_content>
            <#assign delta = "-1">
        <#else>
            <#assign delta = "+1">
        </#if>
        <p>&gt;� <@l10n>votes: ${delta} (${from.getVisibleName()}), total: ${issue.votes}</@l10n></p>
    <#else>
        <p>&gt;� ${event.getPresentation()}</p>
    </#if>
</#list><br>
${Utils.getUrl(issue)}<br>