stackswitcher: Stop hardcoding 100px width

We can now set a min-width in the theme, so we don't have to
hardcode the size request here anymore.

https://bugzilla.gnome.org/show_bug.cgi?id=726371

gtk/gtkstackswitcher.c

@@ -187,11 +187,6 @@ update_button (GtkStackSwitcher *self,
 
   gtk_widget_set_visible (button, gtk_widget_get_visible (widget) && (title != NULL || icon_name != NULL));
 
-  if (icon_name != NULL)
-    gtk_widget_set_size_request (button, -1, -1);
-  else
-    gtk_widget_set_size_request (button, 100, -1);
-
   g_free (title);
   g_free (icon_name);
 

gtk/theme/Adwaita/_common.scss

@@ -2681,6 +2681,7 @@ row {
  *************/
 
 expander {
+  & title:hover { background: red; }
   & arrow {
     -gtk-icon-source: -gtk-icontheme('pan-end-symbolic');
     &:dir(rtl) { -gtk-icon-source: -gtk-icontheme('pan-end-symbolic-rtl'); }
@@ -3376,3 +3377,7 @@ frame.keycap {
 *:dnd {
   border: 1px solid black;
 }
+
+stackswitcher button.text-button {
+  min-width: 100px;
+}

gtk/theme/Adwaita/gtk-contained-dark.css

@@ -3804,6 +3804,8 @@ row {
 /*************
  * Expanders *
  *************/
+expander title:hover {
+  background: red; }
 expander arrow {
   -gtk-icon-source: -gtk-icontheme("pan-end-symbolic"); }
   expander arrow:dir(rtl) {
@@ -4551,6 +4553,12 @@ frame.keycap {
 *:dnd {
   border: 1px solid black; }
 
+stackswitcher button.text-button, stackswitcher GtkScaleButton.button.text-button,
+stackswitcher GtkVolumeButton.button.text-button,
+stackswitcher .titlebar button.text-button.titlebutton,
+.titlebar stackswitcher button.text-button.titlebutton {
+  min-width: 100px; }
+
 /* GTK NAMED COLORS
    ----------------
    use responsibly! */

gtk/theme/Adwaita/gtk-contained.css

@@ -3974,6 +3974,8 @@ row {
 /*************
  * Expanders *
  *************/
+expander title:hover {
+  background: red; }
 expander arrow {
   -gtk-icon-source: -gtk-icontheme("pan-end-symbolic"); }
   expander arrow:dir(rtl) {
@@ -4724,6 +4726,12 @@ frame.keycap {
 *:dnd {
   border: 1px solid black; }
 
+stackswitcher button.text-button, stackswitcher GtkScaleButton.button.text-button,
+stackswitcher GtkVolumeButton.button.text-button,
+stackswitcher .titlebar button.text-button.titlebutton,
+.titlebar stackswitcher button.text-button.titlebutton {
+  min-width: 100px; }
+
 /* GTK NAMED COLORS
    ----------------
    use responsibly! */