tdf#91565: Report builder, missing insert field icon

in Add Field dialog.
Since https://cgit.freedesktop.org/libreoffice/core/commit/?id=50cacaea4d8f2a27ea4d9e626dbb518a57eb9ffc,
author	Caolán McNamara <caolanm@redhat.com>	2016-09-27 09:47:00 +0100
committer	Caolán McNamara <caolanm@redhat.com>	2016-09-27 10:43:36 +0100
commit	50cacaea4d (patch)
tree	a2cf1d1fb2
parent	e6fc195ae8 (diff)
convert floating add field to .ui format
Change-Id: Ica9adc19f370d6340d2f5fac552cf1b995b390e0

it was easier to analyze the problem.

Change-Id: I2c7dda5969d4018689446725dc3e179c6ddc74c8
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/92228
Tested-by: Jenkins
Reviewed-by: Julien Nabet <serval2412@yahoo.fr>

reportdesign/uiconfig/dbreport/ui/floatingfield.ui

@@ -110,6 +110,7 @@
                     <property name="can_focus">False</property>
                     <property name="label" translatable="yes" context="floatingfield|insert">Insert</property>
                     <property name="use_underline">True</property>
+                    <property name="icon_name">cmd/sc_insert.png</property>
                   </object>
                   <packing>
                     <property name="expand">False</property>