Revise shadow setting tooltips and correct fade start minimum value

files/ui/graphicspage.ui

@@ -204,7 +204,7 @@
           <item row="6" column="0">
            <widget class="QCheckBox" name="shadowDistanceCheckBox">
             <property name="toolTip">
-             <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;The distance from the camera at which shadows completely disappear&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+             <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;The distance from the camera at which shadows completely disappear.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
             </property>
             <property name="text">
              <string>Shadow Distance Limit:</string>
@@ -236,7 +236,7 @@
           <item row="7" column="0">
            <widget class="QLabel" name="fadeStartLabel">
             <property name="toolTip">
-             <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;The fraction of the limit above at which shadows begin to gradually fade away&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+             <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;The fraction of the limit above at which shadows begin to gradually fade away.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
             </property>
             <property name="text">
              <string>Fade Start Multiplier:</string>
@@ -269,6 +269,9 @@
           </item>
           <item row="1" column="0">
            <widget class="QCheckBox" name="actorShadowsCheckBox">
+            <property name="toolTip">
+             <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Enable shadows for NPCs and creatures besides the player character. May have a minor performance impact.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+            </property>
             <property name="text">
              <string>Enable Actor Shadows</string>
             </property>
@@ -276,6 +279,9 @@
           </item>
           <item row="3" column="0" alignment="Qt::AlignLeft">
            <widget class="QCheckBox" name="terrainShadowsCheckBox">
+            <property name="toolTip">
+             <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Enable shadows for the terrain including distant terrain. May have a significant performance and shadow quality impact.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+            </property>
             <property name="text">
              <string>Enable Terrain Shadows</string>
             </property>
@@ -290,7 +296,7 @@
              <number>2</number>
             </property>
             <property name="minimum">
-             <double>0.05</double>
+             <double>0</double>
             </property>
             <property name="maximum">
              <double>1</double>
@@ -302,6 +308,9 @@
           </item>
           <item row="0" column="0">
            <widget class="QCheckBox" name="playerShadowsCheckBox">
+            <property name="toolTip">
+             <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Enable shadows exclusively for the player character. May have a very minor performance impact.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+            </property>
             <property name="text">
              <string>Enable Player Shadows</string>
             </property>
@@ -309,6 +318,9 @@
           </item>
           <item row="5" column="0" alignment="Qt::AlignLeft">
            <widget class="QLabel" name="shadowResolutionLabel">
+            <property name="toolTip">
+             <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;The resolution of each individual shadow map. Increasing it significantly improves shadow quality but may have a minor performance impact.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+            </property>
             <property name="text">
              <string>Shadow Map Resolution:</string>
             </property>
@@ -316,6 +328,9 @@
           </item>
           <item row="2" column="0">
            <widget class="QCheckBox" name="objectShadowsCheckBox">
+            <property name="toolTip">
+             <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Enable shadows for primarily inanimate objects. May have a significant performance impact.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+            </property>
             <property name="text">
              <string>Enable Object Shadows</string>
             </property>
@@ -324,7 +339,7 @@
           <item row="4" column="0">
            <widget class="QCheckBox" name="indoorShadowsCheckBox">
             <property name="toolTip">
-             <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Due to limitations with Morrowind's data, only actors can cast shadows indoors, which some might feel is distracting.&lt;/p&gt;&lt;p&gt;Has no effect if actor shadows are not enabled.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+             <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Due to limitations with Morrowind's data, only actors can cast shadows indoors, which some might feel is distracting.&lt;/p&gt;&lt;p&gt;Has no effect if actor/player shadows are not enabled.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
             </property>
             <property name="text">
              <string>Enable Indoor Shadows</string>