Unify definition of unified seach placeholder views fonts

Signed-off-by: Claudio Cambra <claudio.cambra@nextcloud.com>

src/gui/tray/UnifiedSearchPlaceholderView.qml

@@ -37,7 +37,7 @@ ColumnLayout {
 
     EnforcedPlainTextLabel {
         text: qsTr("Start typing to search")
-        font.pixelSize: Style.subLinePixelSize * 1.25
+        font.pixelSize: Style.unifiedSearchPlaceholderViewSublineFontPixelSize
         wrapMode: Text.Wrap
         Layout.fillWidth: true
         horizontalAlignment: Text.AlignHCenter

src/gui/tray/UnifiedSearchResultNothingFound.qml

@@ -38,7 +38,7 @@ ColumnLayout {
     EnforcedPlainTextLabel {
         id: unifiedSearchResultsNoResultsLabel
         text: qsTr("No results for")
-        font.pixelSize: Style.subLinePixelSize * 1.25
+        font.pixelSize: Style.unifiedSearchPlaceholderViewSublineFontPixelSize
         wrapMode: Text.Wrap
         Layout.fillWidth: true
         Layout.preferredHeight: Style.trayWindowHeaderHeight / 2
@@ -48,7 +48,7 @@ ColumnLayout {
     EnforcedPlainTextLabel {
         id: unifiedSearchResultsNoResultsLabelDetails
         text: unifiedSearchResultNothingFoundContainer.text
-        font.pixelSize: Style.topLinePixelSize * 1.25
+        font.pixelSize: Style.unifiedSearchPlaceholderViewTitleFontPixelSize
         wrapMode: Text.Wrap
         maximumLineCount: 2
         elide: Text.ElideRight

theme/Style/Style.qml

@@ -141,6 +141,8 @@ QtObject {
     readonly property int unifiedSearchResultSectionItemVerticalPadding: 8
     readonly property int unifiedSearchResultNothingFoundHorizontalMargin: 10
     readonly property int unifiedSearchInputContainerHeight: 40
+    readonly property int unifiedSearchPlaceholderViewTitleFontPixelSize: pixelSize * 1.25
+    readonly property int unifiedSearchPlaceholderViewSublineFontPixelSize: subLinePixelSize * 1.25
 
     readonly property int radioButtonCustomMarginLeftInner: 4
     readonly property int radioButtonCustomMarginLeftOuter: 5