Fix #9916 (inconsistent step size)

Author: wonder-sk

src/ui/symbollayer/widget_symbolslist.ui

@@ -6,7 +6,7 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>375</width>
+    <width>398</width>
     <height>429</height>
    </rect>
   </property>
@@ -128,11 +128,14 @@
          <item row="0" column="1">
           <widget class="QDoubleSpinBox" name="spinSize">
            <property name="decimals">
-            <number>2</number>
+            <number>5</number>
            </property>
            <property name="maximum">
             <double>99999.000000000000000</double>
            </property>
+           <property name="singleStep">
+            <double>0.200000000000000</double>
+           </property>
            <property name="value">
             <double>1.000000000000000</double>
            </property>
@@ -151,13 +154,13 @@
             <string>°</string>
            </property>
            <property name="decimals">
-            <number>1</number>
+            <number>2</number>
            </property>
            <property name="maximum">
             <double>360.000000000000000</double>
            </property>
            <property name="singleStep">
-            <double>5.000000000000000</double>
+            <double>0.500000000000000</double>
            </property>
           </widget>
          </item>
@@ -180,6 +183,9 @@
            <property name="maximum">
             <double>99999.000000000000000</double>
            </property>
+           <property name="singleStep">
+            <double>0.200000000000000</double>
+           </property>
            <property name="value">
             <double>1.000000000000000</double>
            </property>