截屏后打马赛克时，界面卡死，黑屏，程序崩溃 #2056
Description
使用Snipaste F1截屏后打马赛克时，界面卡死，黑屏，然后几秒后恢复，程序崩溃。
已经有一段时间了，一直未修复，严重影响使用。
软件版本：2.7-Beta x64 (2021.11.25)，x86版本以及微软商店版也存在此问题
运行平台：微软商店 / Windows 桌面
附splog
[2021-12-08 16:00:01.367] [I] ***************************************************************
[2021-12-08 16:00:01.370] [I] Snipaste 2.7-Beta x64 (Desktop) (Qt 5.12.6)
[2021-12-08 16:00:01.370] [I] OS: Windows 10 (10.0) [10.0.19043]
[2021-12-08 16:00:01.370] [I] Cores: 8
[2021-12-08 16:00:01.370] [I] Elevated: false
[2021-12-08 16:00:01.370] [I] Main thread id: 0x56c
[2021-12-08 16:00:01.370] [I] Log level: 2
[2021-12-08 16:00:01.370] [I] Application dir: K:/Program Files/Snipaste-x64
[2021-12-08 16:00:01.370] [I] Working dir: K:/Program Files/Snipaste-x64
[2021-12-08 16:00:01.370] [I] Config: K:/Program Files/Snipaste-x64/config.ini
[2021-12-08 16:00:01.370] [I] Library paths: (K:/Program Files/Snipaste-x64)
[2021-12-08 16:00:01.370] [I] Screen scale: 1
[2021-12-08 16:00:01.370] [I] Retina factor: 1
[2021-12-08 16:00:01.370] [I] Screens: 1
[2021-12-08 16:00:01.370] [I] QRect(0, 0, 1920 x 1080), DPI = 96 , DPR = 1
[2021-12-08 16:00:01.390] [I] Desktops: 1
[2021-12-08 16:00:01.390] [I] OpenGL support: true
[2021-12-08 16:00:01.470] [I] About to import settings from: K:/Program Files/Snipaste-x64/config.ini
[2021-12-08 16:00:01.472] [I] Settings imported
[2021-12-08 16:00:01.475] [I] Breakpad initialized
[2021-12-08 16:00:01.476] [I] Process priority: 1
[2021-12-08 16:00:01.477] [I] Initializing Snipaste...
[2021-12-08 16:00:01.962] [I] Prefetch...
[2021-12-08 16:00:01.970] [I] Preloaded 20 files: 8 ms
[2021-12-08 16:00:01.985] [I] About to apply settings...
[2021-12-08 16:00:01.999] [I] Load default ssl configuration: 36 ms
[2021-12-08 16:00:02.051] [I] Settings applied
[2021-12-08 16:00:02.059] [I] Log level set to: 2
[2021-12-08 16:00:02.089] [I] History dir: K:/Program Files/Snipaste-x64/history
[2021-12-08 16:00:02.090] [W] Failed to open history file "K:/Program Files/Snipaste-x64/history/.sp0" for reading
[2021-12-08 16:00:02.090] [I] Add group
[2021-12-08 16:00:02.160] [I] Request to switch to group 0
[2021-12-08 16:00:02.230] [I] About to restore pasters...
[2021-12-08 16:00:02.230] [I] Group 0 [JS1T2X]: "默认"
[2021-12-08 16:00:02.230] [I] Record version: 193
[2021-12-08 16:00:02.230] [I] To restore: 0
[2021-12-08 16:00:02.230] [I] Pasters touched
[2021-12-08 16:00:02.230] [I] All pasters activated: true
[2021-12-08 16:00:02.239] [I] Unref images: 0 (0 removed)
[2021-12-08 16:00:02.239] [I] Unref dirs: 0 (0 removed)
[2021-12-08 16:00:02.239] [I] Empty history info files: 0 (0 removed)
[2021-12-08 16:00:02.239] [I] Pasters restored
[2021-12-08 16:00:02.240] [I] Launch time: 872 ms
[2021-12-08 16:00:09.104] [I] Parsing command arguments [0]: (sp, show-tray-menu)
[2021-12-08 16:01:03.119] [I] Silent feed checking finished
[2021-12-08 16:01:03.119] [I] No available update
[2021-12-08 16:01:35.208] [I] Parsing command arguments [1]: (sp, snip)
[2021-12-08 16:01:35.208] [I] Snip request: 0 (dest: 0)
[2021-12-08 16:01:35.208] [I] Snipper: preparing...
[2021-12-08 16:01:35.208] [I] Desktop: QRect(0, 0, 1920 x 1080)
[2021-12-08 16:01:35.242] [I] Background size: QSize(1920, 1080)
[2021-12-08 16:01:35.242] [I] Screens: 1
[2021-12-08 16:01:35.242] [I] QRect(0, 0, 1920 x 1080), DPI = 96 , DPR = 1
[2021-12-08 16:01:35.267] [I] Focus set
[2021-12-08 16:01:35.268] [I] Snipper: preparation done (0)
[2021-12-08 16:01:35.269] [I] Snipper: about to appear...
[2021-12-08 16:01:35.269] [I] Snipper: prepare to show...
[2021-12-08 16:01:35.274] [I] Snipper: shown
[2021-12-08 16:01:35.286] [I] Snipper: focus in
[2021-12-08 16:01:35.286] [I] Snipper: ready [0.078 s]
[2021-12-08 16:01:35.387] [W] QWindowsWindow::setGeometry: Unable to set geometry 154x184+1753+492 (frame: 154x184+1753+492) on QWidgetWindow/"magnifierWindow" on "\.\DISPLAY1". Resulting geometry: 154x190+1753+492 (frame: 154x190+1753+492) margins: 0, 0, 0, 0 minimum size: 154x184 maximum size: 154x16777215 MINMAXINFO maxSize=0,0 maxpos=0,0 mintrack=154,184 maxtrack=154,0)
[2021-12-08 16:01:53.759] [E] Oops! Snipaste crashed...
[2021-12-08 16:01:53.759] [E] Dump has been saved to: K:/Program Files/Snipaste-x64/crashes/9fcb3a55-7ed1-4481-8916-f6fb48b44092.dmp