refactor(quickshell): drop the Persona names from the primitives

P5Panel, P5Button, P5Slider and P5Tooltip become Panel, ActionButton,
LevelSlider and Tooltip. ActionButton and LevelSlider avoid clashing
with QtQuick.Controls, which the ask panel imports.

quickshell/components/ActionButton.qml

@@ -48,7 +48,7 @@ FocusScope {
     implicitWidth: wide ? 260 : (row.implicitWidth + panel.contentPad * 2)
     implicitHeight: 44
 
-    P5Panel {
+    Panel {
         id: panel
         anchors.fill: parent
         lean: root.lean

quickshell/components/ChromeSurface.qml

@@ -4,7 +4,7 @@ import "root:/components"
 
 // Calm, permanent-chrome preset. It is deliberately flat and opaque: one
 // neutral hairline, no texture, no ticks, and no accent unless active.
-P5Panel {
+Panel {
     property bool active: false
     property color tone: Theme.treatmentActiveMark
 

quickshell/components/Skew.qml

@@ -3,7 +3,7 @@ import QtQuick.Shapes
 import "root:/config"
 import "root:/components"
 
-// A small block — the small-scale counterpart to P5Panel. Upright and rounded
+// A small block — the small-scale counterpart to Panel. Upright and rounded
 // under the YoRHa theme; it still leans if given a lean.
 //
 // Every tick, rule, meter segment and slider rail in this shell leans at
@@ -23,12 +23,12 @@ Shape {
     property color borderColor: "transparent"
     property real borderWidth: 0
 
-    // Lean of the vertical edges as a fraction of height, matching P5Panel.
+    // Lean of the vertical edges as a fraction of height, matching Panel.
     property real lean: Theme.skew
     property bool leanLeft: false
 
     // Wide, short pieces — the rail's hairline rules — slant their horizontal
-    // edges by a fraction of width instead, exactly as P5Panel does for the
+    // edges by a fraction of width instead, exactly as Panel does for the
     // rail slab.
     property bool vertical: false