Document :hint input and add default binding

See #1607, #1499

CHANGELOG.asciidoc

@@ -21,6 +21,7 @@ Added
 ~~~~~
 
 - New `{host}` replacement for tab- and window titles which evaluates to the current host.
+- Add new default binding `;t` for `:hint input`.
 
 Changed
 ~~~~~~~
@@ -53,6 +54,7 @@ Added
 - New `hints -> find-implementation` to select which implementation (JS/Python)
   should be used to find hints on a page. The `javascript` implementation is
   better, but slower.
+- New `inputs` group for `:hint` to hint text input fields.
 
 Changed
 ~~~~~~~

doc/help/commands.asciidoc

@@ -308,6 +308,7 @@ Start hinting.
  - `all`: All clickable elements.
  - `links`: Only links.
  - `images`: Only images.
+ - `inputs`: Only input fields.
  
 
 

qutebrowser/browser/hints.py

@@ -772,6 +772,7 @@ class HintManager(QObject):
                 - `all`: All clickable elements.
                 - `links`: Only links.
                 - `images`: Only images.
+                - `inputs`: Only input fields.
 
             target: What to do with the selected element.
 

qutebrowser/config/configdata.py

@@ -1472,6 +1472,7 @@ KEY_DATA = collections.OrderedDict([
         ('hint --rapid links tab-bg', [';r']),
         ('hint --rapid links window', [';R']),
         ('hint links download', [';d']),
+        ('hint inputs', [';t']),
         ('scroll left', ['h']),
         ('scroll down', ['j']),
         ('scroll up', ['k']),