Surface: better titles for the task panels, and tooltips

src/Mod/MeshPart/Gui/TaskCurveOnMesh.ui

@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>313</width>
-    <height>247</height>
+    <width>343</width>
+    <height>305</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -23,7 +23,7 @@
       <item row="0" column="0">
        <widget class="QLabel" name="label_4">
         <property name="text">
-         <string>Snap tolerance to vertexes</string>
+         <string>Snap tolerance to vertices</string>
         </property>
        </widget>
       </item>

src/Mod/Surface/Gui/TaskFilling.ui

@@ -17,7 +17,7 @@
    </sizepolicy>
   </property>
   <property name="windowTitle">
-   <string>Filling</string>
+   <string>Fill Surface</string>
   </property>
   <layout class="QGridLayout" name="gridLayout_2">
    <item row="0" column="0">
@@ -25,7 +25,7 @@
      <item>
       <widget class="QPushButton" name="buttonInitFace">
        <property name="text">
-        <string>Initial Face</string>
+        <string>Support surface</string>
        </property>
       </widget>
      </item>
@@ -40,8 +40,11 @@
    </item>
    <item row="1" column="0">
     <widget class="QGroupBox" name="groupBox">
+     <property name="toolTip">
+      <string>Add the edges that will limit the surface.</string>
+     </property>
      <property name="title">
-      <string>Boundary</string>
+      <string>Boundary edges</string>
      </property>
      <layout class="QGridLayout" name="gridLayout">
       <item row="1" column="0" colspan="3">

src/Mod/Surface/Gui/TaskFillingUnbound.ui

@@ -17,13 +17,17 @@
    </sizepolicy>
   </property>
   <property name="windowTitle">
-   <string>Unbound Edges</string>
+   <string>Edge constraints</string>
   </property>
   <layout class="QGridLayout" name="gridLayout_2">
    <item row="0" column="0">
     <widget class="QGroupBox" name="groupBox">
+     <property name="toolTip">
+      <string>Add edges that will be used to constrain the surface,
+that is, the surface will be forced to pass through these edges.</string>
+     </property>
      <property name="title">
-      <string>Unbound Edges</string>
+      <string>Non-boundary edges</string>
      </property>
      <layout class="QGridLayout" name="gridLayout">
       <item row="1" column="0" colspan="3">

src/Mod/Surface/Gui/TaskFillingVertex.ui

@@ -6,18 +6,22 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>273</width>
+    <width>390</width>
     <height>329</height>
    </rect>
   </property>
   <property name="windowTitle">
-   <string>Vertices</string>
+   <string>Vertex constraints</string>
   </property>
   <layout class="QGridLayout" name="gridLayout_2">
    <item row="0" column="0">
     <widget class="QGroupBox" name="groupBox">
+     <property name="toolTip">
+      <string>Add vertices that will be used to constrain the surface,
+that is, the surface will be forced to pass through these points.</string>
+     </property>
      <property name="title">
-      <string>Unbound vertices</string>
+      <string>Non-boundary vertices</string>
      </property>
      <layout class="QGridLayout" name="gridLayout">
       <item row="0" column="0">

src/Mod/Surface/Gui/TaskSections.ui

@@ -11,13 +11,17 @@
    </rect>
   </property>
   <property name="windowTitle">
-   <string>Sections</string>
+   <string>Sectional edges</string>
   </property>
   <layout class="QGridLayout" name="gridLayout_2">
    <item row="0" column="0">
     <widget class="QGroupBox" name="groupBox">
+     <property name="toolTip">
+      <string>Add the edges that will be sectional cuts of the surface,
+that is, the surface will be forced to pass through these edges.</string>
+     </property>
      <property name="title">
-      <string>Sections</string>
+      <string>Sectional edges</string>
      </property>
      <layout class="QGridLayout" name="gridLayout">
       <item row="1" column="0" colspan="2">