Some layout fixes

See issue #2299.

src/EditDialog.ui

@@ -158,6 +158,9 @@ Errors are indicated with a red squiggle underline.</string>
      </widget>
      <widget class="QWidget" name="rtlVerticalLayout">
       <layout class="QVBoxLayout" name="verticalLayout_3">
+       <property name="spacing">
+        <number>0</number>
+       </property>
        <property name="leftMargin">
         <number>0</number>
        </property>

src/MainWindow.cpp

@@ -49,6 +49,7 @@
 #include <QUrlQuery>
 #include <QPrinter>
 #include <QPrintPreviewDialog>
+#include <QPushButton>
 #include <QToolButton>
 
 #ifdef Q_OS_MACX //Needed only on macOS

src/MainWindow.ui

@@ -181,7 +181,7 @@ You can drag SQL statements from an object row and drop them into other applicat
             <rect>
              <x>0</x>
              <y>0</y>
-             <width>641</width>
+             <width>676</width>
              <height>544</height>
             </rect>
            </property>
@@ -968,7 +968,7 @@ You can drag SQL statements from an object row and drop them into other applicat
         </spacer>
        </item>
        <item>
-        <widget class="QPushButton" name="buttonLogClear">
+        <widget class="QToolButton" name="buttonLogClear">
          <property name="minimumSize">
           <size>
            <width>0</width>