fdo#47157 adding Keywords to .desktop files

Adding Keywords to .desktop files, following the suggestions in
https://bugs.freedesktop.org/show_bug.cgi?id=47157#c0

Change-Id: Ic2a1428aaa12bc31b0af8488d166f78d5a970a1d
Reviewed-on: https://gerrit.libreoffice.org/490Reviewed-by: Björn Michaelsen <bjoern.michaelsen@canonical.com>
Tested-by: Björn Michaelsen <bjoern.michaelsen@canonical.com>

sysui/desktop/menus/base.desktop

@@ -9,6 +9,7 @@ MimeType=application/vnd.oasis.opendocument.database;application/vnd.sun.xml.bas
 Name=%PRODUCTNAME Base
 GenericName=Database Development
 Comment=Manage databases, create queries and reports to track and manage your information by using Base.
+Keywords=Data;SQL;
 InitialPreference=5
 X-Ayatana-Desktop-Shortcuts=X-New
 [X-New Shortcut Group]

sysui/desktop/menus/calc.desktop

@@ -9,6 +9,7 @@ MimeType=application/vnd.oasis.opendocument.spreadsheet;application/vnd.oasis.op
 Name=%PRODUCTNAME Calc
 GenericName=Spreadsheet
 Comment=Perform calculations, analyze information and manage lists in spreadsheets by using Calc.
+Keywords=Accounting;Stats;Chart;ods;xls;xlsx;
 InitialPreference=5
 X-Ayatana-Desktop-Shortcuts=X-New
 [X-New Shortcut Group]

sysui/desktop/menus/draw.desktop

@@ -9,6 +9,7 @@ MimeType=application/vnd.oasis.opendocument.graphics;application/vnd.oasis.opend
 Name=%PRODUCTNAME Draw
 GenericName=Drawing Program
 Comment=Create and edit drawings, flow charts, and logos by using Draw.
+Keywords=Vector;Schema;Diagram;odg;
 InitialPreference=5
 X-Ayatana-Desktop-Shortcuts=X-New
 [X-New Shortcut Group]

sysui/desktop/menus/impress.desktop

@@ -9,6 +9,7 @@ MimeType=application/vnd.oasis.opendocument.presentation;application/vnd.oasis.o
 Name=%PRODUCTNAME Impress
 GenericName=Presentation
 Comment=Create and edit presentations for slideshows, meeting and Web pages by using Impress.
+Keywords=Slideshow;odp;ppt;pptx;
 InitialPreference=5
 X-Ayatana-Desktop-Shortcuts=X-New
 [X-New Shortcut Group]

sysui/desktop/menus/math.desktop

@@ -10,6 +10,7 @@ MimeType=application/vnd.oasis.opendocument.formula;application/vnd.sun.xml.math
 Name=%PRODUCTNAME Math
 GenericName=Formula Editor
 Comment=Create and edit scientific formulas and equations by using Math.
+Keywords=Equation;
 InitialPreference=5
 X-Ayatana-Desktop-Shortcuts=X-New
 [X-New Shortcut Group]

sysui/desktop/menus/writer.desktop

@@ -9,6 +9,7 @@ MimeType=application/vnd.oasis.opendocument.text;application/vnd.oasis.opendocum
 Name=%PRODUCTNAME Writer
 GenericName=Word Processor
 Comment=Create and edit text and graphics in letters, reports, documents and Web pages by using Writer.
+Keywords=Text;Letter;CV;odt;doc;docx;
 InitialPreference=5
 X-Ayatana-Desktop-Shortcuts=X-New
 [X-New Shortcut Group]