Added headers to Inspector Panel

Change-Id: Id44d42a9a1495b74ce7f75be28aa2e39403e9f4a
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/99265
Tested-by: Jenkins
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>
diff --git a/svx/source/sidebar/inspector/InspectorTextPanel.cxx b/svx/source/sidebar/inspector/InspectorTextPanel.cxx
index ddbee7f5..d9a389a 100644
--- a/svx/source/sidebar/inspector/InspectorTextPanel.cxx
+++ b/svx/source/sidebar/inspector/InspectorTextPanel.cxx
@@ -51,7 +51,7 @@ InspectorTextPanel::InspectorTextPanel(vcl::Window* pParent,
    float fWidth = mpListBoxStyles->get_approximate_digit_width();
    std::vector<int> aWidths;
    aWidths.push_back(fWidth * 34);
    aWidths.push_back(fWidth * 15);
    aWidths.push_back(fWidth * 34);
    mpListBoxStyles->set_column_fixed_widths(aWidths);
}

diff --git a/svx/uiconfig/ui/inspectortextpanel.ui b/svx/uiconfig/ui/inspectortextpanel.ui
index 71199a8..0b2de5a 100644
--- a/svx/uiconfig/ui/inspectortextpanel.ui
+++ b/svx/uiconfig/ui/inspectortextpanel.ui
@@ -54,8 +54,6 @@
                    <property name="hexpand">True</property>
                    <property name="vexpand">True</property>
                    <property name="model">liststore</property>
                    <property name="headers_visible">False</property>
                    <property name="headers_clickable">False</property>
                    <property name="search_column">0</property>
                    <property name="enable_tree_lines">True</property>
                    <child internal-child="selection">
@@ -63,6 +61,8 @@
                    </child>
                    <child>
                      <object class="GtkTreeViewColumn" id="treeviewcolumn1">
                        <property name="resizable">True</property>
                        <property name="title" translatable="yes" context="inspectortextpanel|property">Properties</property>
                        <child>
                          <object class="GtkCellRendererText" id="cellrenderertext1"/>
                          <attributes>
@@ -75,6 +75,8 @@
                    </child>
                    <child>
                      <object class="GtkTreeViewColumn" id="treeviewcolumn2">
                        <property name="resizable">True</property>
                        <property name="title" translatable="yes" context="inspectortextpanel|value">Values</property>
                        <child>
                          <object class="GtkCellRendererText" id="cellrenderertext2"/>
                          <attributes>