Merge pull request #395 from xyz32/RPM_CPack_Fix

Make package install prefix consistent with cmake install prefix
Handle mouse release event after middle clicking link to prevent text pasting under X based platforms, fixes #397
Rename
Minor improvements for translatable strings plus some renaming
Rename
Minor improvements for translatable strings
Removed duplicate whitespace in source code
Merge pull request #399 from Hummer12007/master

Removed duplicate whitespace in source code
Add separate shortcut to force plain text copy, fixes #322
Remember settings of Clear History dialog, fixes #400