[meld/pathlabel] Give PathLabel widgets flat button styling

[Kai Willadsen <kaiw src gnome org>]

commit c56ed7e49b5efc70368922b5067f1f664f8dba0c
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Sun Aug 1 07:56:14 2021 +1000

    Give PathLabel widgets flat button styling
    
    The actual button appearance is too distracting in these cases for a
    widget that is supposed to be a glorified label.

 meld/resources/ui/dirdiff.ui  | 9 +++++++++
 meld/resources/ui/filediff.ui | 9 +++++++++
 2 files changed, 18 insertions(+)
---
diff --git a/meld/resources/ui/dirdiff.ui b/meld/resources/ui/dirdiff.ui
index b99cb29d..bdb2b447 100644
--- a/meld/resources/ui/dirdiff.ui
+++ b/meld/resources/ui/dirdiff.ui
@@ -33,6 +33,9 @@
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
                 <property name="label" translatable="yes">Folder 1</property>
+                <style>
+                  <class name="flat"/>
+                </style>
               </object>
             </child>
             <style>
@@ -64,6 +67,9 @@
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
                 <property name="label" translatable="yes">Folder 2</property>
+                <style>
+                  <class name="flat"/>
+                </style>
               </object>
             </child>
             <style>
@@ -95,6 +101,9 @@
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
                 <property name="label" translatable="yes">Folder 3</property>
+                <style>
+                  <class name="flat"/>
+                </style>
               </object>
             </child>
             <style>
diff --git a/meld/resources/ui/filediff.ui b/meld/resources/ui/filediff.ui
index 473e487f..cee5a05e 100644
--- a/meld/resources/ui/filediff.ui
+++ b/meld/resources/ui/filediff.ui
@@ -68,6 +68,9 @@
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
                 <property name="label" translatable="yes">File 3</property>
+                <style>
+                  <class name="flat"/>
+                </style>
               </object>
             </child>
             <style>
@@ -126,6 +129,9 @@
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
                 <property name="label" translatable="yes">File 2</property>
+                <style>
+                  <class name="flat"/>
+                </style>
               </object>
             </child>
             <style>
@@ -184,6 +190,9 @@
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
                 <property name="label" translatable="yes">File 1</property>
+                <style>
+                  <class name="flat"/>
+                </style>
               </object>
             </child>
             <style>