tdf#153167 Re-add ImageMap Editor dialog title again

Essentially reapply

    commit 66291d467be4bf0e841814111d57d1af76117f8e
    Date:   Mon Jan 23 12:15:50 2023 -0600

        tdf#153167 ImageMap Editor dialog had no title

after it has been reverted in

    commit a90ef17809071b808a8c703e7e47e045ddabcd4a
    Date:   Tue Jan 24 08:36:48 2023 +0000

        Revert "tdf#153167 ImageMap Editor dialog had no title"

        This reverts commit 66291d467be4bf0e841814111d57d1af76117f8e.

        Reason for revert: didn't wait for jenkins and broke the build
        translatable strings need context attribute.

, but this time add the required context attribute
as well, as it used to be before

    commit 8a35ae3e6c5c45aa1426cfd81472b309d02a1b48
    Date:   Thu May 16 15:17:38 2019 +0100

        weld SvxIMapDlg

Co-authored-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>
Change-Id: Id777e457fe144b0f0746cfc19e7e13e6db7a89a4
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/148914
Tested-by: Jenkins
Reviewed-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>
diff --git a/svx/uiconfig/ui/imapdialog.ui b/svx/uiconfig/ui/imapdialog.ui
index faea4d0..9365875 100644
--- a/svx/uiconfig/ui/imapdialog.ui
+++ b/svx/uiconfig/ui/imapdialog.ui
@@ -5,6 +5,7 @@
  <object class="GtkDialog" id="ImapDialog">
    <property name="can-focus">False</property>
    <property name="border-width">6</property>
    <property name="title" translatable="yes" context="imapdialog|ImapDialog">ImageMap Editor</property>
    <property name="default-width">0</property>
    <property name="default-height">0</property>
    <property name="type-hint">dialog</property>