Add tooltips to buttons and room invite button

src/qml/SidePane/DelegateAccount.qml

@@ -58,6 +58,7 @@ HTileDelegate {
         backgroundColor: "transparent"
         padding: sidePane.currentSpacing / 1.5
         rightPadding: leftPadding
+        toolTip.text: collapsed ? qsTr("Expand") : qsTr("Collapse")
         onClicked: accountDelegate.toggleCollapse()
 
         visible: opacity > 0

src/qml/SidePane/PaneToolBar.qml

@@ -9,14 +9,16 @@ HRowLayout {
     property alias roomFilter: filterField.text
 
     Layout.fillWidth: true
-    Layout.preferredHeight: theme.baseElementsHeight
+    Layout.minimumHeight: theme.baseElementsHeight
+    Layout.maximumHeight: Layout.minimumHeight
 
     HButton {
         icon.name: "add-account"
+        toolTip.text: qsTr("Add another account")
         backgroundColor: theme.sidePane.settingsButton.background
         onClicked: pageLoader.showPage("SignIn")
 
-        Layout.preferredHeight: parent.height
+        Layout.fillHeight: true
     }
 
     HTextField {
@@ -26,7 +28,7 @@ HRowLayout {
         bordered: false
 
         Layout.fillWidth: true
-        Layout.preferredHeight: parent.height
+        Layout.fillHeight: true
 
         onTextChanged: {
             if (window.uiState.sidePaneFilter == text) return