processlist: breakout and de-dupe code, change styles

Also reverts bluetooth pairing modals since quickshell did not approve
of the PR

Modules/ProcessList/ProcessesTab.qml

@@ -0,0 +1,22 @@
+import QtQuick
+import QtQuick.Layouts
+import qs.Common
+import qs.Services
+
+ColumnLayout {
+    id: processesTab
+    anchors.fill: parent
+    spacing: Theme.spacingM
+
+    property var contextMenu: null
+
+    SystemOverview {
+        Layout.fillWidth: true
+    }
+
+    ProcessListView {
+        Layout.fillWidth: true
+        Layout.fillHeight: true
+        contextMenu: processesTab.contextMenu
+    }
+}