Fix various documentation issues

Fix:
  * broken links
  * invalid headline
  * several typos and spelling fixes

Remove:
  * home documentation
  * tips documentation

Add:
  * global search documentation
  * user preferences > applications documentation

issue6428
review30241002

doc/usage.rst

@@ -19,11 +19,9 @@ Synopsis
 
   tryton [options] [url]
 
-After startup, there raises the `login dialog`__ and optionally a
-`tips dialog`__.
+After startup the `login dialog`__ is displayed.
 
 __ Menu-Connection_
-__ Menu-Help-Tips_
 
 
 Options
@@ -180,16 +178,8 @@ All of them are dynamically provided by the actual set of the installed
 :term:`modules` depending on the access rules of the current user. If a menu
 item is clicked, the appropriate action will open in a new tab.
 
-
-Home
-++++
-A tab opens during the startup of the Tryton client: the home.  It is
-usually an item of the `Menu`_ opening when the user calls his
-`Home`__ action defined in the `preferences`__.
-
-__ Menu-User-Home_
-
-__ Menu-User-Preferences_
+A search field allows to quickly filter the menu items by name and to search in
+models for which the global search is enabled.
 
 
 Menu Bar Items
@@ -225,9 +215,6 @@ Connect...
    user may be logged out of the current session, and need to login again.
    Default timeout for inactivity logout is six minutes.
 
-__ Connection-Server-Connection_
-
-
 .. _Menu-Connection-Disconnect:
 
 Disconnect...
@@ -271,10 +258,11 @@ Preferences...
   * Signature: Signature block for the Tryton user.
   * Menu Action: Defines the action which is called as the
     `Menu`_.
-  * Home Action: Defines the action which is called as `Home`__.
   * Language: Language of the client interface.
   * Timezone: The local timezone where the user/client resides.
   * Groups: Displays the users membership to access groups.
+  * Applications: A list of applications along with their access
+    key and the authorization state.
 
 .. _Menu-User-Menu-Reload:
 
@@ -286,11 +274,6 @@ Menu Reload:
 Menu Toggle:
   Toggle the menu visibility
 
-.. _Menu-User-Home:
-
-Home:
-  Opens a new `Home`__ tab.
-
 
 Options
 ^^^^^^^
@@ -409,16 +392,6 @@ A collection of user defined menu favorites.
 Help
 ^^^^
 
-.. _Menu-Help-Tips:
-
-Tips...:
-  Opens the tips dialog.
-
-  * Display a new tip next time: If *checked*, the tips dialog will appear on
-    start.
-  * Previous: Shows last tip.
-  * Next: Shows next tip.
-
 .. _Menu-Help-Keyboard_Shortcuts:
 
 Keyboard Shortcuts...:
@@ -606,7 +579,7 @@ will explains some of them.
 Date/DateTime/Time Widgets
 ^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-Those widgets has several key shortucts to quickly modify the value. Each key
+These widgets have several key shortcuts to quickly modify the value. Each key
 increases if lower case or decreases if upper case:
 
     - `y`: by one year
@@ -713,7 +686,7 @@ using parenthesis.
     which is evaluated as ``Name: Michael or (Name: Pam and Amount: 100)``
 
 RichText Editor
-^^^^^^^^^^^^^^
+^^^^^^^^^^^^^^^
 
 This feature create a rich text editor with various features that allow for
 text formatting. The features are:
@@ -736,16 +709,16 @@ formatted text. The tags are explain follows:
   * Bold: Tag `b` is used, i.e. <b>text</b>
   * Italic: Tag `i` is used, i.e. <i>text</i>
   * Underline: Tag `u` is used, i.e. <u>text</u>
-  * Font family: It is a attrbute `font-family` for `span` tag, i.e.
+  * Font family: It is a attribute `font-family` for `span` tag, i.e.
     <span font-family="Arial">text</span>
-  * Font size: It is a attrbute `size` for `span` tag, i.e. <span size="12">
+  * Font size: It is a attribute `size` for `span` tag, i.e. <span size="12">
     text</span>
   * Text Justify: For justification text is used paragraph tag `p`. The
     paragraph tag is used to create new lines and the alignment is applied
     across the board. Example: <p align='center'>some text</p>
-  * Background color: It is a attrbute `background` for `span` tag, i.e.
+  * Background color: It is a attribute `background` for `span` tag, i.e.
     <span background='#7f7f7f'>text</span>
-  * Foreground color: It is a attrbute `foreground` for `span` tag, i.e.
+  * Foreground color: It is a attribute `foreground` for `span` tag, i.e.
     <span foreground='#00f'>text</span>
 
 Appendix