Change context to 'Editing Text'

The 'In Windows' context is too wide and increases the change for key
binding conflicts with other plugins. The 'Editing Text' context seems
to be the right one for these commands.
Change hotkey for 'Select All Occurrences' to Alt+F3

Ctrl+Shift+I is in conflict with the Inspect command during code
debugging, even if when the context is changed from 'In Windows' to
'Text Editing'.

Therefore, it is better to select new hotkey. Alt+F3 is like in Sublime
Text and it is absolutely free (checked with an Eclipse product with a
large list of plugins).
Change hotkey for 'Select Next Occurrence' to Ctrl+Alt+D

Ctrl+Shift+D is in conflict with the 'Match Pair Inward' command of the
Emmet plugin. Emmet is a popular plugin among web developers and when
installed the 'Select Next Occurence' command does not work.

Therefore, it is better to select new hotkey. Ctrl+Alt+D is still not
very different from Ctrl+Shift+D, it's free and there are also lots of
other Ctrl+Alt+<key> shortcuts for text editing in the Eclipse Platform
and AnyEdit plugin. So, it is a good group to be inside.